docs: def _from_dict(cls, _dict):
          """Initialize a AlignedElement object from a json dictionary."""
          args = {}
          if 'element_pair' in _dict:
              args['element_pair'] = [
                  ElementPair._from_dict(x) for x in (_dict.get('element_pair'))
              ]
          if 'identical_text' in _dict:
              args['identical_text'] = _dict.get('identical_text')
          if 'provenance_ids' in _dict:
              args['provenance_ids'] = _dict.get('provenance_ids')
          if 'significant_elements' in _dict:
              args['significant_elements'] = _dict.get('significant_elements')
          return cls(**args)