Original sentence: Sutherland had been taught to fly in 1940 by US Army Air Corps instructors at the Philippine Army Training Center and had been awarded a civil pilot's licence by the Civil Aeronautics Association
Edited sentence: He had been taught to fly in 1940 by US Army Air Corps instructors at the Philippine Army Training Center and had been awarded a pilot's licence by the Civil Aeronautics Association.In fact, Sutherland had considerable knowledge