Complex sentence: The same year, she returned to Hamburg, attending the Helen Lange Schule where received her school leaving certificate in 1935 and then went on to study medicine at the University of Hamburg graduating in 1937.
Split into simpler sentences: The same year, she returned to Hamburg, attending the Helen Lange Schule, where received her school leaving certificate in 1935. She then went on to study medicine at the University of Hamburg graduating in 1937.