Table:
($ in millions)

For the year ended December 31:	2019	2018	Yr.-to-Yr. Percent Change

Interest expense	$1,344	$723	85.9%

Non-operating adjustment

Acquisition-related charges	(228)	—	NM

Operating (non-GAAP) interest expense	$1,116	$723	54.4

How many rows and columns does this table contain? Return the result as JSON in the format {"row_number": "m", "column_number": "n"}, e.g., {"row_number": "12", "column_number": "7"}.

This table has 6 rows and 4 columns. Thus, the final answer is {"row_number": "6", "column_number": "4"}.