16  The nature of multiple coreference anaphora resolution that involves reflexive/reciprocal pronouns implies the use of syntactic parsing for finding the multiple antecedents, given that antecedents and pronoun should depend on the same head.
as the parser performance is not optimal in patents (e.g., it does not always detect correctly coordinations or the scope of the clause) (Burga et al., 2013), instead of relying on the resulting dependency tree, we use other criteria to establish the clause and, therefore, restrict the search: the system only evaluates cases in which there is at most one content verb between the pronoun and the antecedent candidate (with the candidates having the same structure as NP 1 and NP 2 in (12) and (13) above), and where there are no determined punctuation marks (":" and ";") between them.