List the shrines of the saint whose one of the shrine is Ponza?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/majorShrine> <http://dbpedia.org/resource/Poznań> . ?x <http://dbpedia.org/ontology/majorShrine> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Saint>}
Poznań