| http://www.w3.org/ns/prov#value | - All kind of sites can fluctuate, such as blogs and websites of different dimensions (from small to big portals) Problems of near duplicates Problems of network sites in the same machine or in the same subnet network IP addresses Problems of websites hosted in countries outside the TLD domain suffix Backlinks with the same anchor repeated many times Intensive activities of Google's spiders in the s
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