Table:
Year Ended December 31,

2019	2018	2017

Adjusted EBITDA:

Net income	$53,330	$21,524	$29,251

Adjustments:

Interest expense, interest income and other income, net	(8,483)	503	1,133

Provision for / (benefit from) income taxes	5,566	(9,825)	2,990

Amortization and depreciation expense	22,134	21,721	17,734

Stock-based compensation expense	20,603	13,429	7,413

Acquisition-related expense	2,403	—	5,895

Litigation expense	12,754	45,729	7,212

Total adjustments	54,977	71,557	42,377

Adjusted EBITDA	$108,307	$93,081	$71,628

Examine the given table and identify the contents of cells located at specified locations, denoted by row and column indices. Return each cell value as JSON in the format {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.
Specified positions:
the 7th row and the 1st column,
the 6th row and the 3rd column,
the 11th row and the 4th column,
the 6th row and the 4th column,
the 8th row and the 2nd column,

The extracted cell contents are listed below.
{"row_id":"7", "column_id":"1", "cell_value":"Provision for / (benefit from) income taxes"}
{"row_id":"6", "column_id":"3", "cell_value":"503"}
{"row_id":"11", "column_id":"4", "cell_value":"7,212"}
{"row_id":"6", "column_id":"4", "cell_value":"1,133"}
{"row_id":"8", "column_id":"2", "cell_value":"22,134"}