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LONDON - FEBRUARY 22: The Queen Mother attending a performance of the Count of Luxembourg on February 22, 1983 at the Sadlers Wells Theatre, in London. (Photo by David Levenson/Getty Images)

LONDON - FEBRUARY 22:  The Queen Mother attending a performance of the Count of Luxembourg on February 22, 1983 at the Sadlers Wells Theatre, in London. (Photo by David Levenson/Getty Images)