About: http://webisa.webdatacommons.org/309893813

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	Thus, SIP messages can contain information other than audio, such as graphics, billing data, authentication tokens, or video.
http://www.w3.org/ns/prov#wasQuotedFrom	informit.com