Question: Who was the golden boot winner who had 15 total goals?
Answer(s):
answer: Robin van Persie

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0by030z)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0by030z ns:award.award_category.winners ?y .
?y ns:award.award_honor.award_winner ?x .
?x ns:soccer.football_player.statistics ?c .
?c ns:soccer.football_player_stats.total_goals "15" . 
}