About: http://webisa.webdatacommons.org/447812339

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	Emergency vehicles, including police cars, fire trucks and ambulances, typically include a siren for emitting an audible signal to warn the drivers of other vehicles in the vicinity of the approaching emergency vehicle.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk