Table:
selected characteristic
2008
2009
2010

u.s.-located companies

domestic r&d performance
290680
282393
278977

source of funds

paid for by the company
232505
224920
221706

paid for by others
58176
57473
57271

federal
36360
39573
34199

othera
21816
17900
23072

linked parent companies of u.s. mncs

domestic r&d performance
193465
198335
197163

source of funds

paid for by the company
157782
162968
162421

paid for by others
35684
35367
34742

federal
28827
27386
25524

othera
6856
7982
9218

linked u.s. affiliates of foreign mncs

domestic r&d performance
35054
35538
39700

source of funds

paid for by the company
29059
27798
30175

paid for by others
5996
7739
9524

federal
1414
1749
1469

othera
4581
5990
8055

A merged cell in a table can be described using the JSON {'top-left':(X1, Y1), 'bottom-right':(X2, Y2)}. Here, '(X1, Y1)' represents the top-left and '(X2, Y2)' the bottom-right cells' (row_id, column_id) of the merged region. Using the displayed table image, identify all such merged cells in this table and report their locations in the given format. Note that the numbering of both row and column IDs starts at 1.

The merged cell areas are as follows:
{'top-left':(2, 2), 'bottom-right':(2, 4)}
{'top-left':(9, 2), 'bottom-right':(9, 4)}
{'top-left':(16, 2), 'bottom-right':(16, 4)}.