Complex sentence: Juutilainen is the top scoring Finnish fighter pilot, with 94 official victories in 437 flights in Fokker D.XXI, Brewster Buffalo and Messerschmitt Bf 109 fighter planes.
Split into simpler sentences: Juutilainen is the top scoring Finnish fighter pilot, with 94 official victories in 437 sorties. He flew Fokker D.XXI, Brewster Buffalo and Messerschmitt Bf 109 fighter planes.