diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..4a97a1c
Binary files /dev/null and b/.DS_Store differ
diff --git a/Pipfile b/Pipfile
index 03d61cd..e2ab811 100644
--- a/Pipfile
+++ b/Pipfile
@@ -12,13 +12,18 @@ openai = "*"
 pinecone-client = "*"
 unstructured = "*"
 nltk = "*"
-python-magic-bin = "*"
 fastapi = "*"
 jinja2 = "*"
 uvicorn = "*"
 streamlit = "*"
 streamlit-chat = "*"
 tqdm = "*"
+watchdog = "*"
+yt-dlp = "*"
+youtube-dl = "*"
+pydub = "*"
+faiss-cpu = "*"
+python-dotenv = "*"
 
 [dev-packages]
 
diff --git a/Pipfile.lock b/Pipfile.lock
index 11f34a4..52b49c8 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "e31b9e5be283fe785dfaebf9dff3556cf4900f1f923cfbaa0614054d3945aa97"
+            "sha256": "edb4ca8413b843efead4b844515d0d3aa0ed91e440367f824671abc77186c639"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -120,27 +120,27 @@
         },
         "altair": {
             "hashes": [
-                "sha256:39399a267c49b30d102c10411e67ab26374156a84b1aeb9fcd15140429ba49c5",
-                "sha256:8b45ebeaf8557f2d760c5c77b79f02ae12aee7c46c27c06014febab6f849bc87"
+                "sha256:087d7033cb2d6c228493a053e12613058a5d47faf6a36aea3ff60305fd8b4cb0",
+                "sha256:9f3552ed5497d4dfc14cf48a76141d8c29ee56eae2873481b4b28134268c9bbe"
             ],
             "markers": "python_version >= '3.7'",
-            "version": "==4.2.2"
+            "version": "==5.0.1"
         },
         "anyio": {
             "hashes": [
-                "sha256:25ea0d673ae30af41a0c442f81cf3b38c7e79fdc7b60335a4c14e05eb0947421",
-                "sha256:fbbe32bd270d2a2ef3ed1c5d45041250284e31fc0a4df4a5a6071842051a51e3"
+                "sha256:275d9973793619a5374e1c89a4f4ad3f4b0a5510a2b5b939444bee8f4c4d37ce",
+                "sha256:eddca883c4175f14df8aedce21054bfca3adb70ffe76a9f607aef9d7fa2ea7f0"
             ],
-            "markers": "python_full_version >= '3.6.2'",
-            "version": "==3.6.2"
+            "markers": "python_version >= '3.7'",
+            "version": "==3.7.0"
         },
         "argilla": {
             "hashes": [
-                "sha256:096325b15d2525519277f70904ea9d526347b4dcafec5257d5cfed617b99cdbd",
-                "sha256:4b7f9b56516130ab9d63b3106a244a226506b3109fdaaac0d4829f46d2225fb6"
+                "sha256:90df3a05ce21cfd337de9c65715497fc27916c0589e517ae024ff88b07183341",
+                "sha256:b1b61fbe2ba5aba5e952e51d837d6fb97ddaca58ad09d890bcfddb2cc2587ee5"
             ],
-            "markers": "python_version >= '3.7'",
-            "version": "==1.6.0"
+            "markers": "python_version < '3.12' and python_version >= '3.8'",
+            "version": "==1.12.0"
         },
         "async-timeout": {
             "hashes": [
@@ -213,21 +213,186 @@
             "markers": "python_version >= '3.7'",
             "version": "==1.6.2"
         },
+        "brotli": {
+            "hashes": [
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+                "sha256:12effe280b8ebfd389022aa65114e30407540ccb89b177d3fbc9a4f177c4bd5d",
+                "sha256:160c78292e98d21e73a4cc7f76a234390e516afcd982fa17e1422f7c6a9ce9c8",
+                "sha256:16d528a45c2e1909c2798f27f7bf0a3feec1dc9e50948e738b961618e38b6a7b",
+                "sha256:19598ecddd8a212aedb1ffa15763dd52a388518c4550e615aed88dc3753c0f0c",
+                "sha256:1c48472a6ba3b113452355b9af0a60da5c2ae60477f8feda8346f8fd48e3e87c",
+                "sha256:268fe94547ba25b58ebc724680609c8ee3e5a843202e9a381f6f9c5e8bdb5c70",
+                "sha256:269a5743a393c65db46a7bb982644c67ecba4b8d91b392403ad8a861ba6f495f",
+                "sha256:26d168aac4aaec9a4394221240e8a5436b5634adc3cd1cdf637f6645cecbf181",
+                "sha256:29d1d350178e5225397e28ea1b7aca3648fcbab546d20e7475805437bfb0a130",
+                "sha256:2aad0e0baa04517741c9bb5b07586c642302e5fb3e75319cb62087bd0995ab19",
+                "sha256:3148362937217b7072cf80a2dcc007f09bb5ecb96dae4617316638194113d5be",
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         "cachetools": {
             "hashes": [
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-            "markers": "python_version ~= '3.7'",
-            "version": "==5.3.0"
+            "markers": "python_version >= '3.7'",
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         "certifi": {
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+            "version": "==2023.5.7"
+        },
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+            "version": "==1.15.1"
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+            "version": "==5.1.0"
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         "charset-normalizer": {
             "hashes": [
@@ -325,13 +490,38 @@
             ],
             "version": "==0.9.1"
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+        "cryptography": {
+            "hashes": [
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+            "markers": "python_version >= '3.7'",
+            "version": "==41.0.1"
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         "dataclasses-json": {
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             "markers": "python_version >= '3.6'",
-            "version": "==0.5.7"
+            "version": "==0.5.9"
         },
         "decorator": {
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@@ -343,11 +533,11 @@
         },
         "deprecated": {
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-                "sha256:64756e3e14c8c5eea9795d93c524551432a0be75629f8f29e67ab8caf076c76d"
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-            "version": "==1.2.13"
+            "version": "==1.2.14"
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         "dnspython": {
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@@ -357,14 +547,6 @@
             "markers": "python_version >= '3.7' and python_version < '4.0'",
             "version": "==2.3.0"
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@@ -373,13 +555,51 @@
             "markers": "python_version >= '3.6'",
             "version": "==1.1.0"
         },
+        "faiss-cpu": {
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-            "version": "==0.95.1"
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@@ -477,72 +697,6 @@
             "markers": "python_version >= '3.7'",
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@@ -577,11 +731,11 @@
         },
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@@ -593,11 +747,11 @@
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             "markers": "python_version >= '3.7'",
-            "version": "==1.2.0"
+            "version": "==1.3.1"
         },
         "jsonschema": {
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@@ -609,11 +763,19 @@
         },
         "langchain": {
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-            "version": "==0.0.148"
+            "version": "==0.0.220"
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@@ -716,59 +878,59 @@
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+            "version": "==2.1.3"
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@@ -880,6 +1042,14 @@
             "markers": "python_version >= '3.7'",
             "version": "==6.0.4"
         },
+        "mutagen": {
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@@ -975,11 +1145,11 @@
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@@ -1046,6 +1216,21 @@
             "markers": "python_version >= '3.7'",
             "version": "==0.11.1"
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@@ -1120,120 +1305,156 @@
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             "markers": "python_version >= '3.7'",
-            "version": "==1.10.7"
+            "version": "==1.10.10"
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         "pydeck": {
             "hashes": [
@@ -1243,6 +1464,14 @@
             "markers": "python_version >= '3.7'",
             "version": "==0.8.1b0"
         },
+        "pydub": {
+            "hashes": [
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@@ -1314,6 +1543,14 @@
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+        "python-dotenv": {
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@@ -1322,15 +1559,6 @@
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@@ -1603,38 +1867,38 @@
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@@ -1654,20 +1918,20 @@
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@@ -1677,59 +1941,68 @@
             "index": "pypi",
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@@ -1738,6 +2011,115 @@
             "markers": "python_version >= '3.4'",
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@@ -1808,93 +2190,117 @@
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             ],
             "markers": "python_version >= '3.7'",
-            "version": "==1.9.1"
+            "version": "==1.9.2"
+        },
+        "youtube-dl": {
+            "hashes": [
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+            ],
+            "index": "pypi",
+            "version": "==2021.12.17"
+        },
+        "yt-dlp": {
+            "hashes": [
+                "sha256:c559885322f7f492c1e7fc8f5a59e2a72e47719b59575599cf8b0e69ea70d0a8",
+                "sha256:ed6a8b8e0ad08a4540d4afa0fd08a7f980022c79b9081bd9e63ddc00aeeee5a8"
+            ],
+            "index": "pypi",
+            "version": "==2023.6.22"
         },
         "zipp": {
             "hashes": [
diff --git a/README.md b/README.md
index dc175e8..8c3a9ff 100644
--- a/README.md
+++ b/README.md
@@ -1,66 +1 @@
-
-# LangChain Documentation Helper
-
-A repository for learning LangChain by building a generative ai application.
-
-This is a web application is using a Pinecone as a vectorsotre and answers questions about LangChain 
-(sources from LangChain official documentation). 
-
-
-![Logo](https://github.com/emarco177/documentation-helper/blob/main/static/banner.gif)
-
-
-## Environment Variables
-
-To run this project, you will need to add the following environment variables to your .env file
-
-`PINECONE_API_KEY`
-`PINECONE_ENVIRONMENT_REGION`
-`OPENAI_API_KEY`
-
-## Run Locally
-
-Clone the project
-
-```bash
-  git clone https://github.com/emarco177/documentation-helper.git
-```
-
-Go to the project directory
-
-```bash
-  cd documentation-helper
-```
-
-Download LangChain Documentation
-```bash
-  mkdir langchain-docs
-  wget -r -A.html -P langchain-docs https://langchain.readthedocs.io/en/latest/ 
-```
-
-Install dependencies
-
-```bash
-  pipenv install
-```
-
-Start the flask server
-
-```bash
-  streamlit run main.py
-```
-
-
-## Running Tests
-
-To run tests, run the following command
-
-```bash
-  pipenv run pytest .
-```
-
-
-## 🔗 Links
-[![portfolio](https://img.shields.io/badge/my_portfolio-000?style=for-the-badge&logo=ko-fi&logoColor=white)](https://www.udemy.com/user/eden-marco/)
-[![linkedin](https://img.shields.io/badge/linkedin-0A66C2?style=for-the-badge&logo=linkedin&logoColor=white)](https://www.linkedin.com/in/eden-marco/)
-[![twitter](https://img.shields.io/badge/twitter-1DA1F2?style=for-the-badge&logo=twitter&logoColor=white)](https://www.udemy.com/user/eden-marco/)
+# LangChain Documentation Helper
\ No newline at end of file
diff --git a/backend/core.py b/backend/core.py
index f0876ff..720d7ca 100644
--- a/backend/core.py
+++ b/backend/core.py
@@ -1,34 +1,32 @@
+from dotenv import load_dotenv
 import os
-from langchain.embeddings.openai import OpenAIEmbeddings
+from langchain.embeddings import OpenAIEmbeddings
 from langchain.chat_models import ChatOpenAI
-from langchain.chains import RetrievalQA
+from langchain.chains import ConversationalRetrievalChain
 from langchain.vectorstores import Pinecone
 import pinecone
+from typing import Any, Dict, List
 
+from consts import INDEX_NAME
 
+load_dotenv()
 pinecone.init(
     api_key=os.environ["PINECONE_API_KEY"],
     environment=os.environ["PINECONE_ENVIRONMENT_REGION"],
 )
+OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
 
-INDEX_NAME = "langchain-doc-index"
+def run_llm(query: str, chat_history: List[Dict[str, Any]] = []):
+    embeddings = OpenAIEmbeddings()
+    docsearch = Pinecone.from_existing_index(INDEX_NAME, embeddings)
+    chat = ChatOpenAI(verbose=True, temperature=0)
 
-
-def run_llm(query: str):
-    embeddings = OpenAIEmbeddings(openai_api_key=os.environ["OPENAI_API_KEY"])
-    docsearch = Pinecone.from_existing_index(
-        embedding=embeddings,
-        index_name=INDEX_NAME,
-    )
-    chat = ChatOpenAI(
-        verbose=True,
-        temperature=0,
+    qa = ConversationalRetrievalChain.from_llm(
+        llm=chat, retriever=docsearch.as_retriever(), return_source_documents=True
     )
 
-    qa = RetrievalQA.from_chain_type(
-        llm=chat,
-        chain_type="stuff",
-        retriever=docsearch.as_retriever(),
-        return_source_documents=True,
-    )
-    return qa({"query": query})
+    return qa({"question": query, "chat_history": chat_history})
+
+
+if __name__ == "__main__":
+    print(run_llm(query="What is Langchain?"))
diff --git a/consts.py b/consts.py
new file mode 100644
index 0000000..6300397
--- /dev/null
+++ b/consts.py
@@ -0,0 +1 @@
+INDEX_NAME = "langchain-doc-index"
diff --git a/ingestion.py b/ingestion.py
index 327fa32..e5d15f2 100644
--- a/ingestion.py
+++ b/ingestion.py
@@ -1,36 +1,43 @@
 import os
-
 from langchain.document_loaders import ReadTheDocsLoader
-from langchain.embeddings import OpenAIEmbeddings
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.vectorstores import Pinecone
+from langchain.embeddings import OpenAIEmbeddings
 import pinecone
 
+from consts import INDEX_NAME
+
+
 pinecone.init(
     api_key=os.environ["PINECONE_API_KEY"],
     environment=os.environ["PINECONE_ENVIRONMENT_REGION"],
 )
-INDEX_NAME = "langchain-doc-index"
 
 
-def ingest_docs():
-    loader = ReadTheDocsLoader("langchain-docs/langchain.readthedocs.io/en/latest")
+def ingest_docs() -> None:
+    loader = ReadTheDocsLoader(path="langchain-docs/langchain.readthedocs.io/en/latest")
     raw_documents = loader.load()
-    print(f"loaded {len(raw_documents)} documents")
+    print(f"Loaded {len(raw_documents)} documents")
     text_splitter = RecursiveCharacterTextSplitter(
-        chunk_size=400, chunk_overlap=50, separators=["\n\n", "\n", " ", ""]
+        chunk_size=1000, chunk_overlap=100, separators=["\n\n", "\n", " ", ""]
     )
-    documents = text_splitter.split_documents(raw_documents)
+    documents = text_splitter.split_documents(documents=raw_documents)
+    print(f"Split into {len(documents)} chunks")
+
     for doc in documents:
-        new_url = doc.metadata["source"]
-        new_url = new_url.replace("langchain-docs", "https:/")
+        old_path = doc.metadata["source"]
+        new_url = old_path.replace("langchain-docs", "https:/")
         doc.metadata.update({"source": new_url})
 
+    print(f"Going to insert {len(documents)} to Pinecone")
     embeddings = OpenAIEmbeddings()
-    print(f"Going to add {len(documents)} to Pinecone")
-    Pinecone.from_documents(documents, embeddings, index_name=INDEX_NAME)
-    print("****Loading to vectorestore done ***")
+    Pinecone.from_documents(documents, embeddings, index_name="INDEX_NAME")
+    print("****** Added to Pinecone vectorstore vectors!")
 
 
 if __name__ == "__main__":
     ingest_docs()
+
+
+
+
diff --git a/main.py b/main.py
index 9a374f8..055426f 100644
--- a/main.py
+++ b/main.py
@@ -1,36 +1,63 @@
-import streamlit as st
-from backend.core import run_llm
-
-
-def show_messages(text):
-    messages_str = [
-        f"{_['role']}: {_['content']}" for _ in st.session_state["messages"][1:]
-    ]
-    text.text_area("Messages", value=str("\n".join(messages_str)), height=400)
-
-
-BASE_PROMPT = [{"role": "system", "content": "You are a helpful assistant."}]
+from typing import Set
 
-if __name__ == "__main__":
-    if "messages" not in st.session_state:
-        st.session_state["messages"] = BASE_PROMPT
-
-    st.header("LangChain Udemy Course- Helper Bot")
-    text = st.empty()
-    show_messages(text)
-
-    prompt = st.text_input("Prompt", value="Enter your message here...")
-
-    if st.button("Send"):
-        with st.spinner("Generating response..."):
-            st.session_state["messages"] += [{"role": "user", "content": prompt}]
-            message_response = run_llm(query=prompt)
-            formatted_response = message_response["result"]
-            st.session_state["messages"] += [
-                {"role": "system", "content": formatted_response}
-            ]
-            show_messages(text)
-
-    if st.button("Clear"):
-        st.session_state["messages"] = BASE_PROMPT
-        show_messages(text)
+from backend.core import run_llm
+import streamlit as st
+from streamlit_chat import message
+
+
+def create_sources_string(source_urls: Set[str]) -> str:
+    if not source_urls:
+        return ""
+    sources_list = list(source_urls)
+    sources_list.sort()
+    sources_string = "sources:\n"
+    for i, source in enumerate(sources_list):
+        sources_string += f"{i+1}. {source}\n"
+    return sources_string
+
+
+if "chat_answers_history" not in st.session_state:
+    st.session_state.chat_answers_history = []
+
+st.header("LangChain🦜🔗 Udemy Course- Helper Bot")
+if (
+    "chat_answers_history" not in st.session_state
+    and "user_prompt_history" not in st.session_state
+    and "chat_history" not in st.session_state
+):
+    st.session_state["chat_answers_history"] = []
+    st.session_state["user_prompt_history"] = []
+    st.session_state["chat_history"] = []
+
+
+prompt = st.text_input("Prompt", placeholder="Enter your message here...") or st.button(
+    "Submit"
+)
+
+if prompt:
+    with st.spinner("Generating response..."):
+        generated_response = run_llm(
+            query=prompt, chat_history=st.session_state["chat_history"]
+        )
+
+        sources = set(
+            [doc.metadata["source"] for doc in generated_response["source_documents"]]
+        )
+        formatted_response = (
+            f"{generated_response['answer']} \n\n {create_sources_string(sources)}"
+        )
+
+        st.session_state.chat_history.append((prompt, generated_response["answer"]))
+        st.session_state.user_prompt_history.append(prompt)
+        st.session_state.chat_answers_history.append(formatted_response)
+
+if st.session_state["chat_answers_history"]:
+    for generated_response, user_query in zip(
+        st.session_state["chat_answers_history"],
+        st.session_state["user_prompt_history"],
+    ):
+        message(
+            user_query,
+            is_user=True,
+        )
+        message(generated_response)
diff --git a/modules/__init__.py b/modules/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/modules/youtubeloader.py b/modules/youtubeloader.py
new file mode 100644
index 0000000..65b9094
--- /dev/null
+++ b/modules/youtubeloader.py
@@ -0,0 +1,61 @@
+from dotenv import load_dotenv
+import os
+
+from langchain.document_loaders.generic import GenericLoader
+from langchain.document_loaders.parsers import OpenAIWhisperParser
+from langchain.document_loaders.blob_loaders.youtube_audio import YoutubeAudioLoader
+
+from langchain.chains import RetrievalQA
+from langchain.vectorstores import FAISS
+from langchain.chat_models import ChatOpenAI
+from langchain.embeddings import OpenAIEmbeddings
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+
+load_dotenv()
+OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
+
+# Two Karpathy lecture videos
+#urls = ["https://youtu.be/kCc8FmEb1nY", "https://youtu.be/VMj-3S1tku0"]
+urls = ["https://youtu.be/kCc8FmEb1nY"]
+
+
+# Directory to save audio files
+save_dir = "/Users/maximeberthelot/Downloads/YouTube"
+
+# Check if transcript file exists
+if os.path.exists(os.path.join(save_dir, "transcript.txt")):
+    with open(os.path.join(save_dir, "transcript.txt"), "r") as f:
+        text = f.read()
+else:
+    # Transcribe the videos to text
+    loader = GenericLoader(YoutubeAudioLoader(urls, save_dir), OpenAIWhisperParser(api_key=OPENAI_API_KEY))
+    docs = loader.load()
+    #print(docs)  # Add this line to check if the docs list is empty
+
+    # Combine doc
+    combined_docs = [doc.page_content for doc in docs]
+    text = " ".join(combined_docs)
+
+    # Save transcript to file
+    with open(os.path.join(save_dir, "transcript.txt"), "w") as f:
+        f.write(text)
+
+# Split them
+text_splitter = RecursiveCharacterTextSplitter(chunk_size=1500, chunk_overlap=150)
+splits = text_splitter.split_text(text)
+
+# Build an index
+embeddings = OpenAIEmbeddings()
+vectordb = FAISS.from_texts(splits, embeddings)
+
+# Build a QA chain
+qa_chain = RetrievalQA.from_chain_type(
+    llm=ChatOpenAI(model_name="gpt-3.5-turbo", temperature=0),
+    chain_type="stuff",
+    retriever=vectordb.as_retriever(),
+)
+
+# Ask a question!
+query = "Why do we need to zero out the gradient before backprop at each step?"
+answer = qa_chain.run(query)
+print(answer)
\ No newline at end of file
diff --git a/static/banner.gif b/static/banner.gif
deleted file mode 100644
index 6e32a1c..0000000
Binary files a/static/banner.gif and /dev/null differ