Assertion: fire engine's siren | /r/CapableOf | alert vehicle
Facets:
value: to the presence of an ambulance
type: TRANSITIVE-OBJECT
Source sentences:
text: In addition to visual warnings, ambulances can be fitted with audible warnings, sometimes known as sirens, which can alert people and vehicles to the presence of an ambulance before they can be seen.
text: In addition to visual warnings, most police cars are also fitted with audible warnings, sometimes known as sirens, which can alert people and vehicles to the presence of an emergency vehicle before they can be seen.