Question: What person, that played on "The Jeffersons", died from cardiovascular disease?
Answer(s):
answer: Isabel Sanford

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.02f8jf)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.02f8jf ns:tv.tv_program.regular_cast ?y .
?y ns:tv.regular_tv_appearance.actor ?x .
?x ns:people.deceased_person.cause_of_death ns:m.02k6hp . 
}