Complex sentence: The Mojave Airport, operating part-time as Mojave Spaceport, is the launch point for SpaceShipOne, which performed the first privately funded human spaceflight on June 21,2004.
Split into simpler sentences: The Mojave Airport, operating part-time as Mojave Spaceport, is the launch point for SpaceShipOne. SpaceShipOne performed the first privately funded human spaceflight on June 21,2004.