Chestnut colored horses have won which races?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/colour> <http://dbpedia.org/resource/Chestnut_(coat)> . ?x <http://dbpedia.org/ontology/honours> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Horse>}
Chestnut_(coat)