Question: Which film features Liam Hemsworth and Silvia Petkova?
Answer(s):
answer: The Expendables 2

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.04yd0fh)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.04yd0fh ns:film.actor.film ?y .
?y ns:film.performance.film ?x .
?x ns:film.film.starring ?c .
?c ns:film.performance.actor ns:g.125n2vk5h . 
}