http://dbpedia.org/resource/German_submarine_U-82_(1941)
http://dbpedia.org/resource/German_submarine_U-755
http://dbpedia.org/resource/German_submarine_U-223
http://dbpedia.org/resource/German_submarine_U-571
http://dbpedia.org/resource/German_submarine_U-718
http://dbpedia.org/resource/German_submarine_U-750
http://dbpedia.org/resource/German_submarine_U-559
http://dbpedia.org/resource/German_submarine_U-390
