Table:
Year-ended 31 March 2019	Year-ended 31 March 2018 Restated See note 2

Revenue from external customers by country	$M	$M

UK	83.2	73.5

USA	222.2	199.0

Germany	143.5	128.4

Other countries	261.7	238.1

Total revenue from external customers by country	710.6	639.0

Considerding the provided table image, extract the cells' values in the following postions:
the 2nd row and the 1st column
the 3rd row and the 3rd column
the 7th row and the 2nd column
the 1st row and the 2nd column
the 4th row and the 1st column
the 2nd row and the 3rd column

Format each cell value as a JSON, using the structure {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.

The target cell values are as follows:
{"row_id":"2", "column_id":"1", "cell_value":"Revenue from external customers by country"}
{"row_id":"3", "column_id":"3", "cell_value":"73.5"}
{"row_id":"7", "column_id":"2", "cell_value":"710.6"}
{"row_id":"1", "column_id":"2", "cell_value":"Year-ended 31 March 2019"}
{"row_id":"4", "column_id":"1", "cell_value":"USA"}
{"row_id":"2", "column_id":"3", "cell_value":"$M"}