what is the {statement is subject of} for {William Wyler} has {award received} as {Academy Award for Best Director} ?
Why did Wiliiam Wyler recieve the Academy Award for Best Director?
What did William Wyler do that caused him to receive the Academy Award for Best Director?
SELECT ?x WHERE { ?h property:statement_is_subject_of ?x . resource:William_Wyler property:award_received ?h . ?h property:award_received resource:Academy_Award_for_Best_Director }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q51495> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P166> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q103360> .
?statement <http://www.wikidata.org/entity/P805> ?value. 
} 

SELECT ?value WHERE { wd:Q51495 p:P166 ?s . ?s ps:P166 wd:Q103360 . ?s pq:P805 ?value}