Table:
Year ended December 31,

2019	2018	2017

Beginning balance	$(1.3)	$(1.9)	$(2.2)

Bad debt expense	(1.6)	(0.6)	(0.8)

Write-offs, net of recoveries	1.6	1.2	1.1

Ending balance	$(1.3)	$(1.3)	$(1.9)

How many rows and columns does the given table have? Present the final answer in a JSON format {"row_number": "m", "column_number": "n"} such as {"row_number": "2", "column_number": "3"}.

There are 6 rows and 4 columns in the table. So, the final answer is {"row_number": "6", "column_number": "4"}.