Where are the philosophers from, whose main work is on the matter of feminism in Canada?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/mainInterest> <http://dbpedia.org/resource/Feminism_in_Canada> . ?x <http://dbpedia.org/property/region> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Philosopher>}
Feminism_in_Canada