Complex sentence: Born in Germany, Helga entered a Prussian Protestant convent chosen by her father in 1955; after becoming seriously ill she left the convent and lived in Mannheim, where she studied to be a nurse and a masseuse.
Split into simpler sentences: Born in Germany, Helga entered a Prussian Protestant convent chosen by her father in 1955. After becoming seriously ill she left the convent and lived in Mannheim, where she studied to be a nurse and a masseuse.