Table:
Year	Number of entries

2016	17

2017	23

2018	21

2019	27

2020	23

Examine the given table and locate the cells that contain the following values:
(1) '2018';
(2) 'Brian & Roger';
(3) '21';
(4) 'Date';
(5) '27';
(6) '2019';
(7) '31 January';
Return the cell locations using the JSON format {'value': '<cell value>', 'location': (row index, column index)}, where both row and column indices commence from 1. For the case where a cell is not contained in the table, its location should be denoted as 'DOES NOT EXIST'.

The coordinates of target cells are listed below.
(1) {'value': '2018', 'location': (5, 1)}
(2) {'value': 'Brian & Roger', 'location': 'DOES NOT EXIST'}
(3) {'value': '21', 'location': (5, 2)}
(4) {'value': 'Date', 'location': 'DOES NOT EXIST'}
(5) {'value': '27', 'location': (6, 2)}
(6) {'value': '2019', 'location': (6, 1)}
(7) {'value': '31 January', 'location': 'DOES NOT EXIST'}