A belt structure conveys {HEAD ~ the block} of {TAIL ~ material} from the first end of the conveyor over the second end of the conveyor 
of
A belt structure conveys { HEAD ~ the block } of { TAIL ~ material } from the first end of the conveyor over the second end of the conveyor
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH