In this task, you are given a question. You have to answer the question based on your information.

What Swedish-born American film actress during the 1920s and 1930s lived as a recluse from public and society for a significant portion of her life?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Greta Garbo