Jean-Paul Sartre and Simone de Beauvoir attend the Writers European Community conference [Getty Images]

LENINGRAD, RUSSIA - AUGUST 14: Jean-Paul Sartre and Simone de Beauvoir with René Mabeu, UNESCO general director, attend the Writers European Community conference on August 14, 1963 in Leningrad, Russia. (Photo by Keystone-France/Gamma-Rapho via Getty Images)

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