Table:
Name
Portrait
Appointed
Presented Credentials
Terminated Mission

Josiah Marvel, Jr.
Political appointee

February 27, 1947

March 18, 1947

Left post on March 4, 1949

Eugenie Anderson
Political appointee

October 20, 1949

December 22, 1949

Left post on January 19, 1953

Robert D. Coe
Career FSO

July 29, 1953

September 25, 1953

Relinquished charge on June 1, 1957

Val Peterson
Political appointee

June 26, 1957

August 22, 1957

Left post on February 21, 1961

William McCormick Blair, Jr.
Political appointee

March 29, 1961

May 9, 1961

Left post on May 17, 1964

Katharine Elkus White
Political appointee

April 8, 1964

June 2, 1964

Left post on September 9, 1968

Angier Biddle Duke
Political appointee

September 26, 1968

October 3, 1968

Left post on May 1, 1969

Guilford Dudley Jr.
Political appointee

May 13, 1969

June 18, 1969

Left post on November 2, 1971

Fred J. Russell
Political appointee

November 5, 1971

December 9, 1971

Left post on November 4, 1972

Philip K. Crowe
Political appointee

July 16, 1973

September 13, 1973

Left post on September 27, 1975

John Gunther Dean
Career FSO

October 23, 1975

November 6, 1975

Left post on July 18, 1978

Warren Demian Manshel
Political appointee

June 22, 1978

July 31, 1978

Left post on March 6, 1981

John Langeloth Loeb, Jr.
Political appointee

July 30, 1981

October 13, 1981

Left post on September 13, 1983

Terence A. Todman
Career FSO

October 3, 1983

November 17, 1983

Left post on January 8, 1989

Keith Lapham Brown
Political appointee

November 2, 1988[24]

January 8, 1989

Left post on January 16, 1992

Richard B. Stone
Political appointee

November 21, 1991

February 10, 1992

Left post on October 14, 1993

Edward Elliott Elson
Political appointee

November 22, 1993

January 18, 1994

Left post on June 25, 1998

Richard Swett
Political appointee

June 29, 1998

September 8, 1998

Left post on July 6, 2001

Stuart A. Bernstein
Political appointee

August 3, 2001

September 3, 2001

Left post on January 16, 2005

James Cain
Political appointee

August 2, 2005

September 9, 2005

Left post on January 23, 2009

Laurie S. Fulton
Political appointee

July 15, 2009

August 3, 2009

Left post on February 15, 2013

Rufus Gifford
Political appointee

July 15, 2013

August 13, 2013

Left post on January 20, 2017

Carla Sands
Political appointee

November 2, 2017

December 15, 2017

Currently in office

A table may have multiple cells. We can utilize the json format {'value': '<cell value>', 'location': (row_id, column_id)} to store a cell's positions in a table, where both row and column id start from 1. I am providing you a table image. Please tell me the positions of the cells mentioned below using the above format. If a cell does not exist in the table, denote its location as 'DOES NOT EXIST'.
Values to locate:
(1) 'October 20, 1949',
(2) 'Left post on March 6, 1981',
(3) 'June 26, 1957',
(4) 'Josiah Marvel, Jr. Political appointee',
(5) 'August 13, 2013',
(6) 'Left post on January 20, 2017',
(7) 'July 30, 1981',
(8) 'December 15, 2017',

The target cell locations are as follows:
(1) {'value': 'October 20, 1949', 'location': (3, 3)}
(2) {'value': 'Left post on March 6, 1981', 'location': (13, 5)}
(3) {'value': 'June 26, 1957', 'location': (5, 3)}
(4) {'value': 'Josiah Marvel, Jr. Political appointee', 'location': (2, 1)}
(5) {'value': 'August 13, 2013', 'location': (23, 4)}
(6) {'value': 'Left post on January 20, 2017', 'location': (23, 5)}
(7) {'value': 'July 30, 1981', 'location': (14, 3)}
(8) {'value': 'December 15, 2017', 'location': (24, 4)}