Table:
survey frame
sample size
classification

enumerated individuals
missed individuals
out of scope individuals
non-respondents

number

2006 census
54,772
47,854
3,152
2,343
1,423

missed individuals from 2006
5,431
3,787
737
452
455

births
3,619
3,223
226
55
115

immigrants
2,548
1,900
332
110
206

non-permanent residents
1,470
670
298
82
420

health insurance files
76,711
74,889
901
591
330

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':(A, B), 'bottom-right':(C, D)},  where (A, B) and (C, D) 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.

The merged cell areas are as follows:
{'top-left':(1, 1), 'bottom-right':(3, 1)}
{'top-left':(1, 2), 'bottom-right':(2, 2)}
{'top-left':(1, 3), 'bottom-right':(1, 6)}
{'top-left':(3, 2), 'bottom-right':(3, 6)}.