Question: What professional athlete who began his sports career in 2003 was drafted by the Cleveland Cavaliers?
Answer(s):
answer: LeBron James

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0jm7n)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0jm7n ns:sports.professional_sports_team.draft_picks ?y .
?y ns:sports.sports_league_draft_pick.player ?x .
?x ns:sports.pro_athlete.sports_played_professionally ?c .
?c ns:sports.pro_sports_played.career_start "2003"^^xsd:dateTime . 
}