About: http://webisa.webdatacommons.org/264107055

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 tree is an undirected graph T = (V, E) of vertices and edges having the following properties:
http://www.w3.org/ns/prov#wasQuotedFrom	codeproject.com