About: http://webisa.webdatacommons.org/166588052

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	When proving a figure is a trapezoid, it is necessary to prove that two sides are parallel and two sides are NOT parallel.
http://www.w3.org/ns/prov#wasQuotedFrom	regentsprep.org