Name the sea into which Danish Straits flows and has Kaliningrad as one of the city on the shore ?
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/property/cities> <http://dbpedia.org/resource/Kaliningrad> . ?uri <http://dbpedia.org/property/outflow> <http://dbpedia.org/resource/Danish_straits>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Sea>}
Kaliningrad Danish_straits