{HEAD ~ One example} of {TAIL ~ such a material} is urethane, including polyurethane resin, polyurethane rubber, and combinations thereof 
of
{ HEAD ~ One example } of { TAIL ~ such a material } is urethane , including polyurethane resin , polyurethane rubber , and combinations thereof
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH