What is the {human} for {student of} of {Gustav Mahler}
Who was the individual that was a understudy of Gustav Mahler?
Who was the person that was a student of Gustav Mahler?
SELECT DISTINCT ?a WHERE { ?a property:student_of resource:Gustav_Mahler . ?a rdf:type ontology:human }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1066> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q7304> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?sbj where { ?sbj wdt:P1066 wd:Q7304 . ?sbj wdt:P31 wd:Q5 } 
Anna von Mildenburg Lula Mysz-Gmeiner