About: http://webisa.webdatacommons.org/70664758

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	Your frame of reference may refer to a coordinate system used to measure properties of objects, such as position and orientation.
http://www.w3.org/ns/prov#wasQuotedFrom	pbs.org