A commonality in many of these approaches is that they model the problem of entity coreference as a collection of decisions between mention pairs (Bagga and Baldwin, 1999;Soon et al., 2001;McCallum and Wellner, 2004;Singla and Domingos, 2005;Bengston and Roth, 2008).
due to the paucity of labeled training data, we did not estimate parameters from data, but rather set the compatibility functions manually by specifying their log scores.