Assertion: fire engine's siren | /r/CapableOf | produce more penetration
Facets:
value: to alert the drivers
type: PURPOSE
value: into the vehicles
type: TRANSITIVE-OBJECT
value: ahead
type: MANNER
Source sentences:
text: Also in some European countries, where a hi-lo two tone siren is the only permitted siren for emergency vehicles, a "stadt" siren will be used in cities where it has loud echo that can be heard from blocks away to warn the traffic an emergency vehicle is coming, or a "land" siren will be used on highways to project its noise to the front to produce more penetration into the vehicles ahead to alert the drivers.