{HEAD ~ The server} then determines {TAIL ~ a friend} rank for each of the other users based on the interaction history, wherein the friend rank indicates a measure of a degree of influence the other users have over the first user and stores the friend rank for each of the other users 
{ HEAD ~ The server } then determines { TAIL ~ a friend } rank for each of the other users based on the interaction history , wherein the friend rank indicates a measure of a degree of influence the other users have over the first user and stores the friend rank for each of the other users
HEAD HEAD HEAD HEAD HEAD HEAD OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH