Conversation so far:
Did Simone de Beauvoir ever marry?
Simone de Beauvoir is quoted as saying, Marriage was impossible. I had no dowry.
Did Simone de Beauvoirever have interest in men?
Simone de Beauvoir was bisexual, and her relationships with young women were controversial.
What about Simone de Beauvoir's sexual life caused controversy?
Simone de Beauvoir's relationships with young women were controversial.
Was Simone de Beauvoir ever jailed due to her relationships with young women?
Simone de Beauvoir was suspended from her teaching job and she had her license to teach in France revoked.
Did Simone de Beauvoir have a dedicated partner at all?
Beginning in 1929, de Beauvoir and Jean-Paul Sartre were partners and remained so for fifty-one years, until his death in 1980.

Question: When did they split?
Self-contained rewrite: When did Simone de Beauvoir and Nelson Algren split?