Fix typo in README.md

README.md

@@ -1,7 +1,7 @@
 [![Build](https://github.com/ad-freiburg/qlever-petrimaps/actions/workflows/build.yml/badge.svg)](https://github.com/ad-freiburg/qlever-petrimaps/actions/workflows/build.yml)
 # QLever petrimaps
 
-Visualization of geospatial SPARQL query results for QLever on a map, either as individual objeckts or as a heatmap. Can handle hundreds of millions of result rows, tested with over 200 million results (all streets in OSM). Implemented as a middle-end / middleware.
+Visualization of geospatial SPARQL query results for QLever on a map, either as individual objects or as a heatmap. Can handle hundreds of millions of result rows, tested with over 200 million results (all streets in OSM). Implemented as a middle-end / middleware.
 This is still very much hacked-together, use with care.
 
 Examples: [All railway lines in OSM](https://qlever.cs.uni-freiburg.de/mapui-petri/?query=PREFIX%20osm%3A%20%3Chttps%3A%2F%2Fwww.openstreetmap.org%2F%3E%0APREFIX%20rdf%3A%20%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23%3E%0APREFIX%20geo%3A%20%3Chttp%3A%2F%2Fwww.opengis.net%2Font%2Fgeosparql%23%3E%0APREFIX%20osmkey%3A%20%3Chttps%3A%2F%2Fwww.openstreetmap.org%2Fwiki%2FKey%3A%3E%0ASELECT%20%3Fosm_id%20%3Fgeometry%20WHERE%20%7B%0A%20%20%3Fosm_id%20osmkey%3Arailway%20%3Frail%20.%0A%20%20%3Fosm_id%20rdf%3Atype%20osm%3Away%20.%0A%20%20%3Fosm_id%20geo%3AhasGeometry%20%3Fgeometry%20.%0A%7D&backend=https%3A%2F%2Fqlever.cs.uni-freiburg.de%2Fapi%2Fosm-planet), [All buildings in Germany in OSM](http://qlever.cs.uni-freiburg.de/mapui-petri/?query=PREFIX%20geo%3A%20%3Chttp%3A%2F%2Fwww.opengis.net%2Font%2Fgeosparql%23%3E%20PREFIX%20osmkey%3A%20%3Chttps%3A%2F%2Fwww.openstreetmap.org%2Fwiki%2FKey%3A%3E%20PREFIX%20ogc%3A%20%3Chttp%3A%2F%2Fwww.opengis.net%2Frdf%23%3E%20PREFIX%20osmrel%3A%20%3Chttps%3A%2F%2Fwww.openstreetmap.org%2Frelation%2F%3E%20SELECT%20%3Fosm_id%20%3Fhasgeometry%20WHERE%20%7B%20osmrel%3A51477%20ogc%3AsfContains%20%3Fosm_id%20.%20%3Fosm_id%20geo%3AhasGeometry%20%3Fhasgeometry%20.%20%3Fosm_id%20osmkey%3Abuilding%20%3Fbuilding%20%7D&backend=https%3A%2F%2Fqlever.cs.uni-freiburg.de%2Fapi%2Fosm-planet)