Complex sentence: After a friend offered her a ride in an aircraft, Cochran began taking flying lessons at Roosevelt Airfield, Long Island in the early 1930s and learned to fly an aircraft in just three weeks.
Split into simpler sentences: After a friend offered her a ride in an aircraft, Cochran began taking flying lessons at Roosevelt Airfield, Long Island in the early 1930s. She learned to fly an aircraft in just three weeks.