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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _from_dict(cls, _dict):
 """Initialize a SemanticRolesResult object from a json dictionary."""

        args = {}
        if 'sentence' in _dict:
            args['sentence'] = _dict.get('sentence')
        if 'subject' in _dict:
            args['subject'] = SemanticRolesResultSubject._from_dict(
                _dict.get('subject'))
        if 'action' in _dict:
            args['action'] = SemanticRolesResultAction._from_dict(
                _dict.get('action'))
        if 'object' in _dict:
            args['object'] = SemanticRolesResultObject._from_dict(
                _dict.get('object'))
        return cls(**args)