About: http://webisa.webdatacommons.org/157759872

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	Past practice capitalized on the steadiness of the sounds generated by submarines, particularly nuclear ones.
http://www.w3.org/ns/prov#wasQuotedFrom	usni.org