Table:
calcite	$7 per kilogram

fool's gold	$5 per kilogram

tiger's eye	$6 per kilogram

quartz	$8 per kilogram

topaz	$9 per kilogram

Retrieve the values of cells at the given table positions, indicated by row and column indices. Return each cell value as JSON in the format {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.
Positions to check:
row 1 and column 2
row 4 and column 2
row 5 and column 1
row 2 and column 1
row 4 and column 1
row 2 and column 2
row 3 and column 2
row 1 and column 1

The target cell values are as follows:
{"row_id":"1", "column_id":"2", "cell_value":"$7 per kilogram"}
{"row_id":"4", "column_id":"2", "cell_value":"$8 per kilogram"}
{"row_id":"5", "column_id":"1", "cell_value":"topaz"}
{"row_id":"2", "column_id":"1", "cell_value":"fool's gold"}
{"row_id":"4", "column_id":"1", "cell_value":"quartz"}
{"row_id":"2", "column_id":"2", "cell_value":"$5 per kilogram"}
{"row_id":"3", "column_id":"2", "cell_value":"$6 per kilogram"}
{"row_id":"1", "column_id":"1", "cell_value":"calcite"}