About: http://webisa.webdatacommons.org/335839333

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	Preferably, the envelope is generally rectangular in shape, and sized to have a size greater than a ticket such as an airline ticket.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com