{HEAD ~ said polymeric material} is selected from {TAIL ~ a group} consisting of polypropylene, polyethylene, and nylon 
is selected from
{ HEAD ~ said polymeric material } is selected from { TAIL ~ a group } consisting of polypropylene , polyethylene , and nylon
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH