Initialize a Element object from a json dictionary.

def _from_dict(cls, _dict):
        """Initialize a Element object from a json dictionary."""
        args = {}
        if 'location' in _dict:
            args['location'] = Location._from_dict(_dict.get('location'))
        if 'text' in _dict:
            args['text'] = _dict.get('text')
        if 'types' in _dict:
            args['types'] = [
                TypeLabel._from_dict(x) for x in (_dict.get('types'))
            ]
        if 'categories' in _dict:
            args['categories'] = [
                Category._from_dict(x) for x in (_dict.get('categories'))
            ]
        if 'attributes' in _dict:
            args['attributes'] = [
                Attribute._from_dict(x) for x in (_dict.get('attributes'))
            ]
        return cls(**args)