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Table 4 Coreference formulae

From: Coreference based event-argument relation extraction on biomedical text

Symbol

Name

Formula

Description

(SiD)

Salience in Discourse

corefer(j, k) ⇒ ∃i.rol e(i, j, r) ∧ event(i)

If a token j is coreferent to another token k, there is at least one event related to token j

(T)

Transitivity

role(i, j, r) ∧ corefer(j, k) ⇒ role(i, k, r)

If j plays the role r for i and j is coreferent to k then k also plays the role r for i

(FC)

Feature Copy

corefer(j, k) ∧ F(k, +f) ⇒ role(i, j, r)

If j is coreferent to k and k has feature f then j plays the role r for i