Complex sentence: During World War II, Selbstopfer (German for auto-sacrifice), was a German Nazi project initiated by Hanna Reitsch to create suicide-pilots (like Japanese Kamikaze), flying Fieseler Fi 103 R Reichenberg, a manned version of the V1 Flying Bomb.
Split into simpler sentences: During World War II, Selbstopfer is German for auto-sacrifice, it refers to a German Nazi project initiated by Hanna Reitsch to create suicide-pilots (like Japanese Kamikaze). Flying Fieseler Fi 103 R Reichenberg, a manned version of the V1 Flying Bomb.