About: http://webisa.webdatacommons.org/51821096

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	When a participant chooses to begin presenting in a session, that participant can instruct her client, such as a desktop computer or other electronic device, to send a control command to an appropriate server in the collaboration system.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com