What religion do the politicians follow, who graduated from the Yokkohama Nationaal University?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/almaMater> <http://dbpedia.org/resource/Yokohama_National_University> . ?x <http://dbpedia.org/ontology/religion> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Politician>}
Yokohama_National_University