| http://www.w3.org/ns/prov#value | - f pairs of said users from the usage log data based on (i) the user information, (ii) the resource identification information, (iii) the resource request time information, and (iv) a memory length parameter so as to define a plurality of influence measures, wherein, for each of said pairs of users, one of the users in said each pair appears to exhibit influence, as reflected in said corresponding
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