Complex sentence: The Wright Brothers' third aeroplane (Wright Flyer III) stays in the air for 39 minutes with Wilbur piloting, the first aeroplane flight lasting over half an hour.
Split into simpler sentences: The Wright Brothers' third aeroplane (Wright Flyer III) stays in the air for 39 minutes with Wilbur piloting. This is the first aeroplane flight lasting over half an hour.