In one embodiment, {TAIL ~ communication content} is processed to increase the similarity of superficially dissimilar instances of {HEAD ~ communication content} and to increase the distinctiveness of superficially similar instances of communications content 
In one embodiment , { TAIL ~ communication content } is processed to increase the similarity of superficially dissimilar instances of { HEAD ~ communication content } and to increase the distinctiveness of superficially similar instances of communications content
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH