Table:
Brian Johnson

Johnson with AC/DC on 23 November 2008 in Saint Paul, Minnesota

Background information
Birth name	Brian Francis Johnson
Born	(1947-10-05) 5 October 1947 (age 77)
Dunston, England
Genres	Hard rock, rock and roll, blues rock, glam rock, heavy metal
Occupation(s)	Musician, singer-songwriter
Instrument	Vocals
Years active	1970–present
Labels	EMI, Epic, Atlantic

Website	acdc.com

Based on the given table, what are the contents of the cells in the following positions in the table? Format each cell value as a JSON, using the structure {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.
the 1st row and the 1st column
the 4th row and the 2nd column
the 7th row and the 2nd column
the 2nd row and the 2nd column
the 5th row and the 2nd column
the 8th row and the 1st column

The target cell values are as follows:
{"row_id":"1", "column_id":"1", "cell_value":"Brian Johnson"}
{"row_id":"4", "column_id":"2", "cell_value":"Hard rock, rock and roll, blues rock, glam rock"}
{"row_id":"7", "column_id":"2", "cell_value":"1970–present"}
{"row_id":"2", "column_id":"2", "cell_value":"Brian Francis Johnson"}
{"row_id":"5", "column_id":"2", "cell_value":"Musician, singer-songwriter"}
{"row_id":"8", "column_id":"1", "cell_value":"Labels"}