Question: What Robert Pattinson movies were released before 19 May 2009?
Answer(s):
answer: Dark Kingdom: The Dragon King
answer: Vanity Fair
answer: How to Be
answer: Harry Potter and the Order of the Phoenix
answer: Little Ashes
answer: Harry Potter and the Goblet of Fire
answer: Twilight

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.062dn7)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.062dn7 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.release_date ?num .
FILTER (?num < "2009-05-19"^^xsd:dateTime) . 
}