What is the {human} for {doctoral advisor} of {Isaac Newton}
What doctor advised Isasc Newton?
Who was the doctoral advisor of Isaac Newton?
SELECT DISTINCT ?x WHERE { resource:Isaac_Newton property:doctoral_advisor ?x . ?x rdf:type ontology:human }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q935> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P184> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?obj where { wd:Q935 wdt:P184 ?obj . ?obj wdt:P31 wd:Q5 } 