Question: Who played football and served as Nixon's Vice president?
Answer(s):
answer: Gerald Ford

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.06c97)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.06c97 ns:government.us_president.vice_president ?x .
?x ns:sports.pro_athlete.sports_played_professionally ?c .
?c ns:sports.pro_sports_played.sport ns:m.0jm_ . 
}