Table:
builder	construct - tion no	date ordered	wheel arrange - ment	s cylinder	engine weight	tc&stl no (1883 - 84)

baldwin	4207	december 1877	4 - 4 - 0	12in (mm)	-	2

baldwin	4292	about january 1881	4 - 4 - 0	12in (mm)	-	4

porter	401	november 1880	2 - 4 - 0	10in (mm)	-	96

mason	645	march 1881	2 - 6 - 6 t	13in (mm)	-	54

mason	581	spring 1881	0 - 4 - 4 t	12in (mm)	-	55

brooks	610	november 1881	2 - 6 - 0	14in (mm)	-	56

brooks	659	february 1882	2 - 6 - 0	14in (mm)	-	77

brooks	937	june 1883	2 - 6 - 0	15in (mm)	-	96

brooks	941	july 1883	2 - 6 - 0	15in (mm)	-	97

Examine the given table and identify the contents of cells located at specified locations, denoted by row and column indices. Format each cell value as a JSON, using the structure {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.
Specified positions:
the 7th row and the 6th column,
the 10th row and the 6th column,

The target cell values are as follows:
{"row_id":"7", "column_id":"6", "cell_value":"-"}
{"row_id":"10", "column_id":"6", "cell_value":"-"}