Since {TAIL ~ some} of {HEAD ~ the polymerizations} exhibit some characteristics of living polymerizations, block copolymers can be readily made 
Since { TAIL ~ some } of { HEAD ~ the polymerizations } exhibit some characteristics of living polymerizations , block copolymers can be readily made
OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH