Question: In which city does Carlos Santana live that was also the birthplace of an American football player?
Answer(s):
answer: San Francisco

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01304j)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01304j ns:people.person.places_lived ?y .
?y ns:people.place_lived.location ?x .
?x ns:location.location.people_born_here ?c .
?c ns:type.object.type ns:american_football.football_player . 
}