Question: What actor who died on 23 December 1994 portrayed Darth Vader at the end of "Return of the Jedi"?
Answer(s):
answer: Sebastian Shaw

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0f2y0)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0f2y0 ns:film.film_character.portrayed_in_films ?y .
?y ns:film.performance.actor ?x .
?y ns:film.performance.film ns:m.0ddjy .
?x ns:people.deceased_person.date_of_death "1994-12-23"^^xsd:dateTime . 
}