{HEAD ~ A server} receives {TAIL ~ an interaction history} comprising a set of one to one interactions between a first user and other users 
receives
{ HEAD ~ A server } receives { TAIL ~ an interaction history } comprising a set of one to one interactions between a first user and other users
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