The grouping of documents with {TAIL ~ the same fingerprint} facilitates creation of anti spam rules or identification of web pages from {HEAD ~ particular websites}, for example 
The grouping of documents with { TAIL ~ the same fingerprint } facilitates creation of anti spam rules or identification of web pages from { HEAD ~ particular websites } , for example
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH