Question: Which American football player was the first president of the AFL?
Answer(s):
answer: Lamar Hunt

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