Question: Which planet was discovered by Johann Gottfired and Urbain Le Verrier ?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE {?uri prop:discoverer <http://dbpedia.org/resource/Johann_Gottfried_Galle> . ?uri onto:discoverer <http://dbpedia.org/resource/Urbain_Le_Verrier>  . ?uri rdf:type onto:Planet}