Complex sentence: Goalball is a team sport designed for blind athletes, originally devised in 1946 by the Austrian Hanz Lorenzen and German Sepp Reindle as a means to assist the rehabilitation of visually-impaired World War II veterans.
Split into simpler sentences: Goalball is a team sport designed for blind athletes. It was devised by Hanz Lorenzen (Austria), and Sepp Reindle (Germany), in 1946 in an effort to help in the rehabilitation of visually impaired World War II veterans.