Array
(
    [index] => Array
        (
            [_index] => trademarks
            [_type] => _doc
            [_id] => USPTO-88983905
            [status] => 400
            [error] => Array
                (
                    [type] => mapper_parsing_exception
                    [reason] => failed to parse field [applicationDate] of type [date] in document with id 'USPTO-88983905'. Preview of field's value: ''
                    [caused_by] => Array
                        (
                            [type] => illegal_argument_exception
                            [reason] => cannot parse empty date
                        )

                )

        )

)