docs: def parse_sentence(obj: dict) -> BioCSentence:
      """Deserialize a dict obj to a BioCSentence object"""
      sentence = BioCSentence()
      sentence.offset = obj['offset']
      sentence.infons = obj['infons']
      sentence.text = obj['text']
      for annotation in obj['annotations']:
          sentence.add_annotation(parse_annotation(annotation))
      for relation in obj['relations']:
          sentence.add_relation(parse_relation(relation))
      return sentence