<http://webisa.webdatacommons.org/299930867> <http://www.w3.org/ns/prov#value> "A letter can be comprised of an invoice, marketing message, personal note and any other item that fits into a business-sized envelope." . <http://webisa.webdatacommons.org/299930867> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/178940505> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/299930867> . <http://webisa.webdatacommons.org/prov/77112192> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/299930867> . <http://webisa.webdatacommons.org/299930867> <http://www.w3.org/ns/prov#wasQuotedFrom> <stamps.com> .