Complex sentence: A Sudanese Air Force MiG-29 was shot down by heavy machine gun fire while attacking the JEM convoy; the Russian mercenary pilot was killed as his parachute did not open after ejecting.
Split into simpler sentences: A Sudanese Air Force MiG-29 was shot down by heavy machine gun fire while attacking the JEM convoy. The Russian mercenary pilot was killed as his parachute did not open after ejecting.