About: http://webisa.webdatacommons.org/328579475

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	You could work around that by using a VU meter in camera (using ML if necessary to get one) in order to make sure there is an appropriate looking signal.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com