Data mining in {HEAD ~ a digital map database} to identify {TAIL ~ intersections} located at hill bottoms and enabling precautionary actions in a vehicle 
to identify
Data mining in { HEAD ~ a digital map database } to identify { TAIL ~ intersections } located at hill bottoms and enabling precautionary actions in a vehicle
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH