Table:
Event	Begin	End

lunch	10:50 A.M.	11:50 A.M.

obstacle course	12:10 P.M.	1:10 P.M.

water balloon toss	1:00 P.M.	1:50 P.M.

pie-eating contest	1:55 P.M.	2:45 P.M.

swimming competition	2:30 P.M.	3:15 P.M.

What is the count of rows and columns in the given table? Format your final answer as a JSON, using the structure {"row_number": "m", "column_number": "n"}.

This table has 7 rows and 3 columns. Thus, the final answer is {"row_number": "7", "column_number": "3"}.