About: http://webisa.webdatacommons.org/370432945

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	Work on sonar had also been carried out in the Axis countries, notably in Germany, which included countermeasures.
http://www.w3.org/ns/prov#wasQuotedFrom	reference.com