A request associated with one or more network resources may be received, and {HEAD ~ a set} of one or more tags associated with {TAIL ~ the request} may be identified 
A request associated with one or more network resources may be received , and { HEAD ~ a set } of one or more tags associated with { TAIL ~ the request } may be identified
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH