SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/property/discoverer> <http://dbpedia.org/resource/Johann_Gottfried_Galle> . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Planet>}
Which planet was first discovered by Johann Gottfried Galle?
SELECT DISTINCT ?d WHERE { ?d rdf:type ontology:Planet . ?d property:discoverer resource:Johann_Gottfried_Galle }
Neptune
The planet discovered by Johann Gottfried Galle is [Neptune].
Frederic Galliano discovered [Neptune].
The planet discovered by him is [Neptune].
The planet he discovered is [Neptune].