PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The USAAF considered a number of different options including the use of remotely piloted vehicles before choosing parasite fighters as the most viable B-36 defense.[5] The concept of a parasite fighter had its origins in 1918, when the Royal Air Force examined the viability of Sopwith Camel parasite fighters operating from R23 airships.[N 1] In the 1930s, the U.S. Navy had a short-lived operationa
http://www.w3.org/ns/prov#wasQuotedFrom
  • wikipedia.org