Encapsulators are linguistic units which which establish coherent links to preceding text units. In this paper, we address the challenge of automatically analysing the pronoun ello in Spanish text. Our method identifies, for each occurrence, the antecedent of the pronoun, the connective phrase which links ello to its antecedent, the semantic relation holding between the two, and... We describe our annotation of a corpus to inform the development of our method and to finetune an automatic analyser based on bidirectional encoder representation transformers (BERT). On testing our method, we find that it performs with greater accuracy than two baselines (0.76 for the resolution task), and sets a promising benchmark for the automatic annotation of occurrences of the pronoun ello, their antecedents, and the semantic relations holding between these encapsulators and their antecedents .