Table:
Athlete	Event	Heat	Semifinal	Final

Time	Rank	Time	Rank	Time	Rank

Christopher Duenas	100 m freestyle	53.37	44	Did not advance

Benjamin Schulte	10 km open water	N/A	2:03:35.1	25

This is a table picture. Can you figure out the row and column numbers for this particular table? Output the final answer as JSON in the format {"row_number": "m", "column_number": "n"}.

There are 4 rows and 8 columns in the table. So, the final answer is {"row_number": "4", "column_number": "8"}.