Question: Which actor, known for the character of Mason Capwell, died of a heart attack?
Answer(s):
answer: Terry Lester

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.04f3bz1)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.04f3bz1 ns:tv.tv_character.appeared_in_tv_program ?y .
?y ns:tv.regular_tv_appearance.actor ?x .
?x ns:people.deceased_person.cause_of_death ns:m.0gk4g . 
}