(1) X has an antecedent beyond a segment boundary def description (2) X has an antecedent two or more utterances distant def description (3) X has an antecedent in (u1), and (3a) X occurs in strong parallel context pronoun (3b) X / ∈ f ocus def description (3c) X ∈ f ocus and • X has a competing referent Y ∈ f ocus def description • X has a competing referent Y in (u1) amplified with apposition or nonrestrictive relative clause def description • else pronoun The repetition blocking rule overrides the pronominalization suggested in (3c) to a definite description.
figure 2: The algorithm pronoun repetition blocking seems to be an aggregation trigger rather than a motivation for definite description generation.