About: http://webisa.webdatacommons.org/135299166

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	They confirmed that variation of such factors as objectfilm distance, and object or film angulation, can result in a lineal image distortion.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com