The process 52 wherein {HEAD ~ each} of {TAIL ~ the parallel processing elements} generates an intermediate result for its respective partition 
of
The process 52 wherein { HEAD ~ each } of { TAIL ~ the parallel processing elements } generates an intermediate result for its respective partition
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH