SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/breeder> <http://dbpedia.org/resource/Jacques_Van't_Hart> . ?x <http://dbpedia.org/property/race> ?uri . }
How many races have the horses bred by Jacques Van't Hart participated in?
SELECT DISTINCT COUNT ( ?s ) WHERE { ?y property:race ?s . . ?y property:breeder resource:Jacques_Van't_Hart }
8
There are [8] races of the horses whose breeder is Jacques Van't Hart.
There are [8] breeds of horses whose breeders are Jacques Van't Hart.