In the method, {HEAD ~ a specification} of {TAIL ~ the target web site} is received, and a number of field web sites related to the target web site are identified 
In the method , { HEAD ~ a specification } of { TAIL ~ the target web site } is received , and a number of field web sites related to the target web site are identified
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH