Table:
Value

Diameter

Composition

1975–1979

1981-

Obverse
Reverse
Obverse
Reverse

1 seniti

18 mm

Bronze

Maize
Pig

Maize
Vanilla

2 seniti

21 mm

Marrows
PLANNED FAMILIES FOOD FOR ALL, six people holding hands

Taro
PLANNED FAMILIES FOOD FOR ALL, six people holding hands

5 seniti

19 mm

Cupronickel

Chicken with chicks
Bananas

Chicken with chicks
Coconuts

10 seniti

24 mm

King
Grazing cattle

King
Bananas on tree

20 seniti

29 mm

King
Bees and hive

King
Yams

50 seniti

32–33 mm

King
Fishes around a vortex

King
Tomatoes

Examine the given table and locate the cells that contain the following values:
(1) '50 seniti',
(2) '1981-\nObverse',
(3) '2 seniti',
(4) '18 mm',
(5) 'Composition',
(6) '10 seniti',
(7) 'Tomatoes',
Return the cell locations using the JSON format {'value': '<cell value>', 'location': (row_id, column_id)}, where both row and column id commence from 1. Should a cell be absent in the table, denote its location as 'DOES NOT EXIST'.

The coordinates of target cells are listed below.
(1) {'value': '50 seniti', 'location': (7, 1)}
(2) {'value': '1981-\nObverse', 'location': (1, 6)}
(3) {'value': '2 seniti', 'location': (3, 1)}
(4) {'value': '18 mm', 'location': (2, 2)}
(5) {'value': 'Composition', 'location': (1, 3)}
(6) {'value': '10 seniti', 'location': (5, 1)}
(7) {'value': 'Tomatoes', 'location': (7, 7)}