About: http://webisa.webdatacommons.org/66709088

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	detect errors, such as lines which converge but should be parallel or a slanting horizon, in time to notice and correct them.
http://www.w3.org/ns/prov#wasQuotedFrom	butkus.org