diff --git a/sparql-anything-html/src/main/java/com/github/sparqlanything/html/MetadataWriter.java b/sparql-anything-html/src/main/java/com/github/sparqlanything/html/MetadataWriter.java
index 667bbeab..45734335 100644
--- a/sparql-anything-html/src/main/java/com/github/sparqlanything/html/MetadataWriter.java
+++ b/sparql-anything-html/src/main/java/com/github/sparqlanything/html/MetadataWriter.java
@@ -20,6 +20,7 @@
  */
 package com.github.sparqlanything.html;
 
+import org.apache.any23.extractor.ExtractionContext;
 import org.apache.any23.writer.TripleHandlerException;
 import org.apache.any23.writer.TripleWriterHandler;
 import org.apache.jena.graph.BlankNodeId;
@@ -31,10 +32,13 @@
 import org.eclipse.rdf4j.model.Value;
 
 import com.github.sparqlanything.model.FacadeXGraphBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class MetadataWriter extends TripleWriterHandler {
-
+	private static final Logger log = LoggerFactory.getLogger(MetadataWriter.class);
 	private FacadeXGraphBuilder facadeXGraphBuilder;
+	private String runningExtractor = null;
 
 	public MetadataWriter(FacadeXGraphBuilder facadeXGraphBuilder) {
 		this.facadeXGraphBuilder = facadeXGraphBuilder;
@@ -45,8 +49,22 @@ public void close() throws TripleHandlerException {
 
 	}
 
+	@Override
+	public void openContext(ExtractionContext context) throws TripleHandlerException {
+		super.openContext(context);
+		runningExtractor = context.getExtractorName();
+		log.debug("Run extractor: {}", runningExtractor);
+	}
+
+	@Override
+	public void closeContext(ExtractionContext context) throws TripleHandlerException {
+		super.closeContext(context);
+		runningExtractor = null;
+	}
+
 	@Override
 	public void writeTriple(Resource s, IRI p, Value o, Resource g) throws TripleHandlerException {
+		log.debug("Graph: {} ({})", g, runningExtractor, g);
 		facadeXGraphBuilder.add(resolveValue(g), resolveValue(s), NodeFactory.createURI(p.stringValue()),
 				resolveValue(o));
 	}