Table:
cancer group
average number of cases per year
annual incidence rate
percent (%) of childhood cancer cases

all cancers
905
161
100

leukemias
292
52
32

cns tumours
173
31
19

lymphomas
100
18
11

neuroblastomas
71
13
8

soft tissue sarcomas
59
10
6

Your is as follows:
Examine the table image and determine the locations of the mentioned cells. You need to express a cell's position with the JSON {'value': '<cell value>', 'location': (row number, column number)}, with row and column number both commencing from 1. For the case where a cell is not contained in the table, its location should be denoted as 'DOES NOT EXIST'.
Cells to locate:
(1) '18';
(2) '14 = 23 + 6';
(3) '19';
(4) '905';
(5) 'leukemias';
(6) 'Encoding';
(7) '71';
(8) '292';
(9) 'annual incidence rate';
(10) '6';

The target cell locations are as follows:
(1) {'value': '18', 'location': (5, 3)}
(2) {'value': '14 = 23 + 6', 'location': 'DOES NOT EXIST'}
(3) {'value': '19', 'location': (4, 4)}
(4) {'value': '905', 'location': (2, 2)}
(5) {'value': 'leukemias', 'location': (3, 1)}
(6) {'value': 'Encoding', 'location': 'DOES NOT EXIST'}
(7) {'value': '71', 'location': (6, 2)}
(8) {'value': '292', 'location': (3, 2)}
(9) {'value': 'annual incidence rate', 'location': (1, 3)}
(10) {'value': '6', 'location': (7, 4)}