About: http://webisa.webdatacommons.org/121433873

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	Create an undirected shallow copy (vertices and edges) of the directed graph so that for any directed edge (u, v) there is an undirected edge (u, v).
http://www.w3.org/ns/prov#wasQuotedFrom	metacpan.org