Question: Which child in the Kennedy family was an American Football player?
Answer(s):
answer: Joseph P. Kennedy, Jr.

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01qlg1)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01qlg1 ns:people.person.children ?x .
?x ns:sports.pro_athlete.sports_played_professionally ?c .
?c ns:sports.pro_sports_played.sport ns:m.0jm_ . 
}