Complex sentence: She and her brother, Bubi, were liberated in 1945, and she came to the U.S. on a refugee boat in 1951 to join Bubi, who was studying in New York.
Split into simpler sentences: She and her brother, Bubi, were liberated in 1945. She came to the U.S. on a refugee boat in 1951 to join Bubi, who was studying in New York.