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