Complex sentence: The family got by on the debts owed to Mr. Kunitomi, which Embrey's mother would collect from friends and neighbors, until Mrs. Kunitomi took out a loan and opened a small grocery store in 1941.
Split into simpler sentences: The family got by on the debts owed to Mr. Kunitomi, which Embrey's mother would collect from friends and neighbors. This went on until Mrs. Kunitomi took out a loan and opened a small grocery store in 1941.