Table:
Islero

Species	Spanish Fighting Bull
Breed	Miura
Sex	Male
Born	Seville, Andalusia, Spain
Nation from	Spain
Known for	Gored and killed Manolete
Owner	Eduardo Miura Fernández
Weight	495 Kg

Different merged cells often exist in a table and they can be represented by the JSON {'top-left':(R1, C1), 'bottom-right':(R2, C2)}. In this JSON item, '(R1, C1)' and '(R2, C2)' 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.

This table does not contain any merged cells.