About: http://webisa.webdatacommons.org/454959776

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	DAG (directed acyclic graph) can model the problem (what is a cycle?) and the DFS can produce a sort that defines one valid ordering of paths to follow.
http://www.w3.org/ns/prov#wasQuotedFrom	ius.edu