A computer implemented matching service matches users to other users, and to user communities, based at least in part on a computer analysis of {HEAD ~ event data} reflective of {TAIL ~ user behaviors} 
reflective of
A computer implemented matching service matches users to other users , and to user communities , based at least in part on a computer analysis of { HEAD ~ event data } reflective of { TAIL ~ user behaviors }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL