Table:
Years Ended December 31,

2019	2018

Telecommunication - Maintenance	$86.8	$87.0

Telecommunication - Installation	33.2	41.5

Power - Operations, Maintenance & Construction Support	19.9	31.0

Power - Cable Installation & Repair	32.6	34.8

Total revenue from contracts with customers	172.5	194.3

Other revenue	—	—

Total Marine Services segment revenue	$172.5	$194.3

Given a table image, please tell me which table cells are merged cells. Return the merged cell areas in the JSON format of {'top-left':(R1, C1), 'bottom-right':(R2, C2)}, where (R1, C1) and (R2, C2) represent the (row_id, column_id) coordinates of top-left cell and bottom-right cell, respectively. The row_id and column_id are numberd from 1.

This table does not contain any merged cells.