Question: Which husband of Veronica Lake was the executive producer of "Billion Dollar Brain?"?
Answer(s):
answer: André de Toth

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01xm6k)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01xm6k ns:people.person.spouse_s ?y .
?y ns:people.marriage.spouse ?x .
?y ns:people.marriage.type_of_union ns:m.04ztj .
?x ns:film.producer.films_executive_produced ns:m.0466p3x . 
}