Table:
map of the United States	$8

cookbook	$8

airplane calendar	$9

book of brainteasers	$5

map of Canada	$4

dog calendar	$5

For the shown table, how many rows and columns are there? The final result should be presented in the JSON format of {"row_number": "m", "column_number": "n"}.

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