Original sentence: With financial backing from his sister Olga, Sikorsky returned to Paris in 1909 to study aeronautics in the world renamed ETACA (Ecole des Techniques Aéronautiques et de Construction Automobile) engineer school and to purchase aircraft parts
Edited sentence: With financial backing from his sister Olga, Sikorsky returned to Paris in 1909 to study aeronautics in the world renowned ETACA (Ecole des Techniques Aéronautiques et de Construction Automobile) engineer school and to purchase aircraft parts