for each of a plurality of users, collecting and storing, in computer storage, event data representing user generated events reflective of user behaviors, said event data collected via a computer network without requiring {HEAD ~ the users} to explicitly provide {TAIL ~ personal preference information} 
for each of a plurality of users , collecting and storing , in computer storage , event data representing user generated events reflective of user behaviors , said event data collected via a computer network without requiring { HEAD ~ the users } to explicitly provide { TAIL ~ personal preference information }
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