About: http://webisa.webdatacommons.org/3610933

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	A square is a rectangle with equal width and height, and we could do a strange implementation like in the above example.
http://www.w3.org/ns/prov#wasQuotedFrom	tutsplus.com