{HEAD ~ A precautionary action system} installed in a vehicle uses {TAIL ~ this database}, or a database derived therefrom, in combination with a positioning system to take a precautionary action as the vehicle approaches such a location 
uses
{ HEAD ~ A precautionary action system } installed in a vehicle uses { TAIL ~ this database } , or a database derived therefrom , in combination with a positioning system to take a precautionary action as the vehicle approaches such a location
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH