About: http://webisa.webdatacommons.org/133851095

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	Commercial filters which detect the start time of a commercial advertisement and the return to a program are commercially available and are used in devices such as video recorders.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com