What happened to Corrie's sister (Betsie) and her father?

Many years later, Corrie, her sister Betsy, and their father were imprisoned in Nazi concentration camps for hiding Jews in a secret room in their home. Corrie’s sister and father passed away during their imprisonment. Corrie was released from Ravensbrück, due to a clerical error, just a week before all the women her age were killed.

Explanation:

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