Table:
Number of hamburger places	Number of chefs

1	5

2	10

3	15

4	20

5	?

Tell me how many rows and columns exist in the given table. The JSON format {"row_number": "m", "column_number": "n"} should be utilized to display the ultimate result.

There are 6 rows and 2 columns in the table. So, the final answer is {"row_number": "6", "column_number": "2"}.