{HEAD ~ The tackifier} is {TAIL ~ a solid material} which has been fractured through fiber displacement such, as by physical bending, to produce a fiber tow that is pliable 
is
{ HEAD ~ The tackifier } is { TAIL ~ a solid material } which has been fractured through fiber displacement such , as by physical bending , to produce a fiber tow that is pliable
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH