Table:
Stem	Leaf

4	0, 3, 4, 5, 9

5	7, 8

6	3, 3, 3, 4, 7, 7

7	0, 2, 3, 8

8	0, 0, 3

How many rows and columns does this table contain? Your final answer should be in the JSON structure, formatted as {"row_number": "m", "column_number": "n"}.

There are 7 rows and 2 columns in the table. So, the final answer is {"row_number": "7", "column_number": "2"}.