Table:
age group
women
men

non-aboriginal
aboriginal
non-aboriginal
aboriginal

percent

15 or older
14.7
22.0
12.5
14.6

15 to 24
4.1
8.1
4.4
7.0

25 to 54
9.1
21.3
8.1
12.1

55 to 64
20.8
33.9
19.0
26.8

65 or older
35.0
53.4
30.6
39.2

Given a table image, please tell me which table cells are merged cells. Return the merged cell areas in the JSON format of {'top-left':(X, Y), 'bottom-right':(Z, W)}, where (X, Y) and (Z, W) represent the (row_id, column_id) coordinates of top-left cell and bottom-right cell, respectively. The row_id and column_id are numberd from 1.

The merged cell areas are as follows:
{'top-left':(1, 1), 'bottom-right':(3, 1)}
{'top-left':(1, 2), 'bottom-right':(1, 3)}
{'top-left':(1, 4), 'bottom-right':(1, 5)}
{'top-left':(3, 2), 'bottom-right':(3, 5)}.