Both these strategies lead to improvements for all three standard coreference metrics: MUC (Vilain et al., 1995), B 3 (Bagga and Baldwin, 1998), and CEAF (Luo, 2005).
our specialized ranker system provides absolute f -score improvements against an otherwise identical standard classifier system by 3.2%, 3.1%, and 3.6% for MUC, B 3 , and CEAF, respectively.