About: http://webisa.webdatacommons.org/333320935

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 guard is an expression attached to an arc that must return either true or false.
http://www.w3.org/ns/prov#wasQuotedFrom	project-open.org