Table:
Athlete	Event	Heat	Semifinal	Final

Result	Rank	Result	Rank	Result	Rank

Jan Sekpona	Men's 800 m	1:54.25	8	Did not advance

Sandrine Thiébaud-Kangni	Women's 400 m	52.87	7	Did not advance

Your task is as follows:
In this table image, locate all merged cells and detail their regions using the JSON {'top-left':(x, y), 'bottom-right':(m, n)}. Here, '(x, y)' and '(m, n)' denote the coordinates (row_id, column_id) of the top-left and bottom-right cells of the merged regions, respectively. Keep in mind that row and column IDs start from 1.

The merged cell areas are as follows:
{'top-left':(1, 1), 'bottom-right':(2, 1)}
{'top-left':(1, 2), 'bottom-right':(2, 2)}
{'top-left':(1, 3), 'bottom-right':(1, 4)}
{'top-left':(1, 5), 'bottom-right':(1, 6)}
{'top-left':(1, 7), 'bottom-right':(1, 8)}
{'top-left':(3, 5), 'bottom-right':(3, 8)}
{'top-left':(4, 5), 'bottom-right':(4, 8)}.