Anaphora resolution output format

All the anaphora resolution algorithms output relations between each pronoun and the head of the noun phrase it was found to refer to. The pronouns and their antecedents are uniquely identified using a sentence number and position within the sentence, see below for an example.
it 11 9 aids 11 3
it 24 9 payment 24 2
him 28 22 donor 28 9