What is {birthdate} of {doctoral student} of {Martin Luther} ?
Who gave the{birthdate} of {doctoral understudy} of {Martin Luther} ?
Who gave the{birthdate} of {doctoral student} of {Martin Luther} ?
SELECT ?m WHERE { ?h property:date_of_birth ?m . resource:Martin_Luther property:doctoral_student ?h }
SELECT ?answer WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q9554> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P185>. ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?X . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?X. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P569> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer . }
SELECT ?answer WHERE { wd:Q9554 wdt:P185 ?X . ?X wdt:P569 ?answer}
1509-01-01T00:00:00Z