Question: Was Ganymede discovered by Galileo Galilei?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
ASK WHERE { <http://dbpedia.org/resource/Ganymede_(moon)> prop:discoverer <http://dbpedia.org/resource/Galileo_Galilei> }