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