Question: What Facebook founder is the subject of the movie "The Social Network?"?
Answer(s):
answer: Mark Zuckerberg

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0hmyfsv)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0hmyfsv ns:organization.organization.founders ?x .
?x ns:film.film_subject.films ns:m.07s846j . 
}