Table:
Place
Player
Country
Score
To par

T1
David Graham
Australia
68-71=139
–1

Sandy Lyle
Scotland
68-71=139

T3
Tony Johnstone
Zimbabwe
68-72=140
E

Christy O'Connor Jnr
Ireland
64-76=140

D. A. Weibring
United States
69-71=140

T6
Howard Clark
England
70-71=141
+1

Bernhard Langer
West Germany
72-69=141

Robert Lee
England
68-73=141

Wayne Riley
Australia
71-70=141

Emilio Rodríguez
Spain
71-70=141

Peter Senior
Australia
70-71=141

Ian Woosnam
Wales
70-71=141

Tell me how many rows and columns exist in the given table. Your final answer should be in the JSON structure, formatted as {"row_number": "m", "column_number": "n"}.

This table has 13 rows and 5 columns. Thus, the final answer is {"row_number": "13", "column_number": "5"}.