Table:
Date

Race

Dist (f)

Course

Class

Prize (£K)

Odds

Runners

Placing

Margin

Time

Jockey

Trainer

5 September 1999

Dance Design EBF Maiden

8

Curragh

M

4

Evens

13

1

1.5

1:41.80

Johnny Murtagh

John Oxx

19 September 1999

National Stakes

8

Curragh

1

104

7-1

8

1

Head

1:46.20

Johnny Murtagh

John Oxx

16 April 2000

Ballysax Stakes

10

Leopardstown

L

13

5-2

4

2

Head

2:19.70

Johnny Murtagh

John Oxx

14 May 2000

Derrinstown Stud Derby Trial

10

Leopardstown

3

28

7-4

4

1

Head

2:04.90

Johnny Murtagh

John Oxx

10 June 2000

Epsom Derby

12

Epsom

1

609

7-1

15

1

1

2:36.75

Johnny Murtagh

John Oxx

2 July 2000

Irish Derby

12

Curragh

1

385

11-10

11

1

9

2:33.90

Johnny Murtagh

John Oxx

10 September 2000

Prix Niel

12

Longchamp

2

38

3-10

6

1

8

2:26.40

Johnny Murtagh

John Oxx

1 October 2000

Prix de l'Arc de Triomphe

12

Longchamp

1

576

6-4

10

1

1.5

2:25.80

Johnny Murtagh

John Oxx

I need you to conduct the following task:
Given this table image, find all merged table cells and return merged regions with the JSON {'top-left':(R1, C1), 'bottom-right':(R2, C2)},  where (R1, C1) and (R2, C2) indicate the (row_id, column_id) of top-left and bottom-right cells in the merged regions, respectively. You should remember that row id and column id start from 1.

This table does not contain any merged cells.