About: http://webisa.webdatacommons.org/54042903

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	An invoice may generate as often as once a month if there is a balance other than zero on the account or if there has been any activity on the account since the prior billing cycle.
http://www.w3.org/ns/prov#wasQuotedFrom	northwestern.edu