The method 60, wherein {HEAD ~ the region} is identified with {TAIL ~ sufficient precision} to distinguish the region from 1.5×1014 other regions 
is identified with
The method 60 , wherein { HEAD ~ the region } is identified with { TAIL ~ sufficient precision } to distinguish the region from 1.5×1014 other regions
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH