Table:
Date
Race
Race track
Category
Lap length

July 21, 1946
1st Grand Prix des Nations
Circuit des Nations
Grand Prix FIA
2.900 km (1.802 mi)Switzerland

May 2, 1948
2nd Grand Prix de Genève
Circuit des Nations
Formula 2 FIA, non-championship
2.900 km (1.802 mi)

May 2, 1948
2nd Grand Prix des Nations
Circuit des Nations
Formula 1 FIA, non-championship
2.900 km (1.802 mi)

July 30, 1950
3rd Grand Prix de Genève
Circuit des Nations
Formula 2 FIA, non-championship
3.990 km (2.479 mi)

July 30, 1950
3rd Grand Prix des Nations
Circuit des Nations
Formula 1 FIA, non-championship
3.990 km (2.479 mi)

This image displays a table. Could you provide me with the row number and column number corresponding to this table? Return the result as JSON in the format {"row_number": "m", "column_number": "n"}, e.g., {"row_number": "12", "column_number": "7"}.

There are 6 rows and 5 columns in the table. So, the final answer is {"row_number": "6", "column_number": "5"}.