Question: WHat film made a debut in Buenos Aries and featured actor Liam Hemsworth?
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.release_date_s ?c .
?c ns:film.film_regional_release_date.film_regional_debut_venue ns:m.01ly5m . 
}