<http://webisa.webdatacommons.org/12309821>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<microsoft.com> .
<http://webisa.webdatacommons.org/12309821>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/84722055>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/12309821> .
<http://webisa.webdatacommons.org/12309821>	<http://www.w3.org/ns/prov#value>	"Envelope Schemas: A special type of schema that specifies the structure of an envelope, using several extra properties that are specific to envelopes and which specify information such as identifying the envelope" .