About: http://webisa.webdatacommons.org/57664505

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	Because a back edge is defined as an edge whose initial vertex is larger than the terminal vertex in the sort sequence, at least one edge is a back edge in a cycle.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com