In an exemplary embodiment, {HEAD ~ users} of the system are provided with {TAIL ~ a list} of n firms 
In an exemplary embodiment , { HEAD ~ users } of the system are provided with { TAIL ~ a list } of n firms
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH