docs: def _from_dict(cls, _dict):
          """Initialize a QueryRelationsRelationship object from a json dictionary."""
          args = {}
          if 'type' in _dict:
              args['type'] = _dict.get('type')
          if 'frequency' in _dict:
              args['frequency'] = _dict.get('frequency')
          if 'arguments' in _dict:
              args['arguments'] = [
                  QueryRelationsArgument._from_dict(x)
                  for x in (_dict.get('arguments'))
              ]
          if 'evidence' in _dict:
              args['evidence'] = [
                  QueryEvidence._from_dict(x) for x in (_dict.get('evidence'))
              ]
          return cls(**args)