Question: Which of Aubrey Hepburns husbands produced El Greco?
Answer(s):
answer: Mel Ferrer

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0dqcm)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0dqcm ns:people.person.spouse_s ?y .
?y ns:people.marriage.spouse ?x .
?y ns:people.marriage.type_of_union ns:m.04ztj .
?x ns:people.person.gender ns:m.05zppz .
?x ns:film.producer.film ns:m.04jlyb4 . 
}