About: http://webisa.webdatacommons.org/159043036

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	The categorical definition of a groupoid is even simpler : it is a category in which every morphism is an isomorphism.
http://www.w3.org/ns/prov#wasQuotedFrom	neverendingbooks.org