Table:
local government area	type	major town	land area (km square)	pop 2006	density km 2	towns	est

roxby downs	municipal council	roxby downs	110	4292	39018	2	1982

coober pedy	district council	coober pedy	77 , 8	1996	25656	1	1987

anangu pitjantjatjara yankunytjatjara	aboriginal council	umuwa	102650	2204	21	18	1981

maralinga tjarutja 1)	aboriginal council	oak valley	102863 , 6	105	1	1	1984

yalata	aboriginal council	yalata	4563	100	22	1	1994

nepabunna	aboriginal council	nepabunna , south australia	76 , 4	49	641	1	1998

outback areas community development trust	unincorporated area	leigh creek	624339.0	3750	6	36	1978

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':(X, Y), 'bottom-right':(Z, W)},  where (X, Y) and (Z, W) 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.

This table does not contain any merged cells.