Table:
Position
Officer[1]
current officers
superseded by
Royal Household[2]

1
Lord High Steward
vacant
Justiciar
Lord Steward

2
Lord High Chancellor
The Rt Hon Chris Grayling, MP

3
Lord High Treasurer
in commission

4
Lord President of the Council
The Rt Hon Nick Clegg, MP

5
Lord Privy Seal
The Rt Hon Andrew Lansley, CBE, MP

6
Lord Great Chamberlain
The Marquess of Cholmondeley
Lord High Treasurer
Lord Chamberlain

7
Lord High Constable
vacant
Earl Marshal

Master of the Horse

8
Earl Marshal
The Duke of Norfolk

9
Lord High Admiral
HRH The Duke of Edinburgh

Tell me the row and column numbers of the shown table. Present the final answer in a JSON format {"row_number": "m", "column_number": "n"} such as {"row_number": "2", "column_number": "3"}.

There are 10 rows and 5 columns in the table. So, the final answer is {"row_number": "10", "column_number": "5"}.