Question: In what country is the Mekong River located and is also the subject of the movie Regret to Reform?
Answer(s):
answer: Vietnam

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0j0g5)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0j0g5 ns:location.location.partially_containedby ?x .
?x ns:film.film_subject.films ns:m.04zzdvz . 
}