Question: What actress played Danielle Rousseau on the television show in which the theme song was "Losin'"?
Answer(s):
answer: Danielle Rousseau

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:tv.tv_program.theme_song ns:m.03g74kj . 
?c ns:tv.tv_program.regular_cast ?y .
?y ns:tv.regular_tv_appearance.character ?x .
?x ns:type.object.name ?sk0 .
FILTER (str(?sk0) = "Danielle Rousseau")
}