Table:
x	y

15	20

16	15

17	5

Please extract and show the values of the cells in the 2nd column of this table. Provide the cells in a column in the JSON structure, using the format {"column_id":"<column index>", "cell_list":"<a list of cells in this column>"}.

The cells in the 2nd column: {"column_id": "2", "cell_list": ['y', '20', '15', '5']}