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