3. The method of claim 2 , further comprising identifying documents in the first set which the trained second classifier model assigns a class different from the one assigned based on the reviewer's label.
3. The method of claim 2 , further comprising identifying documents in the first set which the trained second classifier model assigns a class different from the one assigned based on the reviewer's label. 4. The method of claim 3 , further comprising measuring a quality of the review of the first set of documents based on the identified documents.