<http://webisa.webdatacommons.org/prov/484969470> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/374348204> . <http://webisa.webdatacommons.org/374348204> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/374348204> <http://www.w3.org/ns/prov#value> "Alternatively, the initiator 60 may be fired using an external signal, such as a signal from the vehicle or structure 104 or from a separate control center, operator, or other device." . <http://webisa.webdatacommons.org/374348204> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.com> .