Table:
Athlete	Event	Heat	Quarterfinal	Semifinal	Final

Result	Rank	Result	Rank	Result	Rank	Result	Rank

Héctor Cotto	110 m hurdles	13.72	6 q	13.73	8	Did not advance

Javier Culson	400 m hurdles	49.60	4 q	N/A	49.85	8	Did not advance

David Freeman	1500 m	3:39.70	10	N/A	Did not advance

Félix Martínez	400 m	46.46	7	N/A	Did not advance

Could you count the number of rows and columns in this table? Your final answer should be in the JSON structure, formatted as {"row_number": "m", "column_number": "n"}.

This table has 6 rows and 10 columns. Thus, the final answer is {"row_number": "6", "column_number": "10"}.