Hence, in this work we use the annotations produced by such systems to adapt a standard RNN layer by introducing a bias towards coreferent recency.
given an input sequence and coreference clusters extracted from an external system, we introduce a term in the update equations for Gated Recurrent Units (GRU) (Cho et al., 2014) which depends on the hidden state of the coreferent antecedent of the current token (if it exists).