About: http://webisa.webdatacommons.org/85429808

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The term is generally applied to submarine bases constructed during World War II, particularly in Germany and the occupied countries which were also known as U-boat pens (after the phrase U-boat to refer to German submarines).
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org