For this introduction to SPARQL, we will be using the Wikidata SPARQL endpoint: https://query.wikidata.org/
Please see the following link for the tutorial content. It uses the SPARQL endpoint mentioned above.
https://www.wikidata.org/wiki/Wikidata:SPARQL_tutorial
At KCNI, our Knowledge Graph is created using the Blue Brain Nexus data management platform. For more information about Nexus, please see the following link: https://bluebrainnexus.io/