What is the {fictional human} for {student} of {Luke Skywalker}
Who is the understudy of Luke Skywalker?
Who is the student of Luke Skywalker?
SELECT DISTINCT ?j WHERE { ?j rdf:type ontology:fictional_human . ?j property:student resource:Luke_Skywalker }
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/P802> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q51746> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q15632617> } 
 select distinct ?sbj where { ?sbj wdt:P802 wd:Q51746 . ?sbj wdt:P31 wd:Q15632617 } 
Obi-Wan Kenobi