List the former partner of the figure skaters whose former choreographer was Igor Shpillband.
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/formerChoreographer> <http://dbpedia.org/resource/Igor_Shpillband> . ?x <http://dbpedia.org/ontology/formerPartner> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/FigureSkater>}
Igor_Shpillband