Experiments show that the proposed method improves the performance by 2.9 and 1.6 to 67.3 and 67.2 in F1-measure on the MUC-6 and MUC-7 corpora, respectively, due to much more gain in precision compared with the loss in recall.
surprisingly, their experiments also show that eliminating non-anaphors using an anaphoricity determination module in advance harms the performance.