Question: In 2010 Real Madrid C.F. purchased a prominent football player from which team?
Answer(s):
answer: Portugal national football team
answer: Real Madrid C.F.

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:soccer.football_player.transfers ?k .
?k ns:soccer.football_player_transfer.purchasing_team ns:m.06l22 . 
?c ns:sports.pro_athlete.teams ?y .
?y ns:sports.sports_team_roster.team ?x .
FILTER(NOT EXISTS {?y ns:sports.sports_team_roster.from ?sk0} || 
EXISTS {?y ns:sports.sports_team_roster.from ?sk1 . 
FILTER(xsd:datetime(?sk1) <= "2010-12-31"^^xsd:dateTime) })
FILTER(NOT EXISTS {?y ns:sports.sports_team_roster.to ?sk2} || 
EXISTS {?y ns:sports.sports_team_roster.to ?sk3 . 
FILTER(xsd:datetime(?sk3) >= "2010-01-01"^^xsd:dateTime) })
}