About: http://webisa.webdatacommons.org/314793710

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	It comes from a meaning of at one time and other definitions of at once are of things happening at at the same time; or in one heap or body together; or at the same time or simultaneously.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com