Table:
Stem	Leaf

1	1

2	1, 1, 1, 1, 2, 3

3	4, 8

4	4

5	0, 2

6

7	2, 5, 8, 8, 9

For the shown table, how many rows and columns are there? Output the final answer as JSON in the format {"row_number": "m", "column_number": "n"}.

There are 9 rows and 2 columns in the table. So, the final answer is {"row_number": "9", "column_number": "2"}.