What is the {human} for {doctoral student} of {Max Planck}
Who was a student of Max Planck?
Name a student of Max Planck
SELECT DISTINCT ?y WHERE { ?y property:doctoral_student resource:Max_Planck . ?y 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/P185> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q9021> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?sbj where { ?sbj wdt:P185 wd:Q9021 . ?sbj wdt:P31 wd:Q5 } 
Alexander von Brill