About: http://webisa.webdatacommons.org/268765327

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	In a case where the line is not available due to a phone set or other communication device on the phone line being off-hook, the logic high output from NOR gate 61, via OR gate 62, would set RS flip-flop 67.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com