About: http://webisa.webdatacommons.org/401357795

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	These are often made of sturdier material than standard envelopes and are often used by businesses to transport documents that are not to be folded or damaged, such as legal documents and contracts.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com