| http://www.w3.org/ns/prov#value | - Each of the extracting units 92 comprises Mn extracting subunits 94 (94 1, . . . 94 k) (in the illustrated case, Mn=k where k is an integer of not less than 0) which are processed in parallel and which perform subject extractions having different characteristics, and a condition evaluating section 96 which evaluates the conditions for the subject extractions on the basis of the results in the resp
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