About: http://webisa.webdatacommons.org/423210266

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	This was no sinecure, training was tough and Observers were expected to identify all types of aircraft accurately, as well as being able to determine speed, height and direction.
http://www.w3.org/ns/prov#wasQuotedFrom	alternatehistory.com