Table:
with a university degree
sample size

fathers
mothers
fathers
mothers

percent
number

second generation groups

south asian
30.8
21.9
11,849
11,778

black
16.8
7.9
7,416
10,063

chinese
33.6
19.7
9,919
10,197

filipino
33.2
35.9
2,917
3,923

southeast asian
18.5
8.7
2,254
2,589

west asian/arab
33.7
21.7
4,662
3,839

latin american
13.6
9.6
1,896
2,644

korean
42.5
27.4
830
935

japanese
38.1
22.6
351
483

white
17.8
13.3
74,368
71,695

all second generation
21.6
15.2
117,167
119,011

third-plus generation whites
15.2
10.6
492,854
560,890

Different merged cells often exist in a table and they can be represented by the JSON {'top-left':(x, y), 'bottom-right':(m, n)}. In this JSON item, '(x, y)' and '(m, n)' are the (row_id, column_id) coordinates for the top-left and bottom-right cells in the merged region, respectively. Please examine the provided table image, identify all merged cells, and return their details using the above-mentioned format. Remember, the numbering for both rows and columns starts at 1.

The merged cell regions 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, 3)}
{'top-left':(3, 4), 'bottom-right':(3, 5)}
{'top-left':(4, 2), 'bottom-right':(4, 5)}.