code: def _get_evidence_text(self, event_tag):
          
          par_id = event_tag.attrib.get('paragraph')
          uttnum = event_tag.attrib.get('uttnum')
          event_text = event_tag.find('text')
          if self.sentences is not None and uttnum is not None:
              sentence = self.sentences[uttnum]
          elif event_text is not None:
              sentence = event_text.text
          else:
              sentence = None
          return sentence
docs: Extract the evidence for an event.
  
          Pieces of text linked to an EVENT are fragments of a sentence. The
          EVENT refers to the paragraph ID and the "uttnum", which corresponds
          to a sentence ID. Here we find and return the full sentence from which
          the event was taken.