Table:
Rank
Name
Nationality
Time (automatic)
Notes

Harrison Dillard
United States
13.91
OR

Jack Davis
United States
14.00

Arthur Barnard
United States
14.40

4
Yevhen Bulanchyk
Soviet Union
14.73

5
Ken Doubleday
Australia
14.82

6
Ray Weinberg
Australia
15.15

Tell me how many rows and columns exist in the given table. The JSON format {"row_number": "m", "column_number": "n"} should be utilized to display the ultimate result.

There are 7 rows and 5 columns in the table. So, the final answer is {"row_number": "7", "column_number": "5"}.