About: http://webisa.webdatacommons.org/408873536

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	???details_channel_source??? is a field that clearly defines whether a broadcast channel of an emergency alert message is an analog channel or a digital channel.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com