Complex sentence: The Gulfstream G500 and G600 (GVII) are twin-engine business jet airplanes unveiled by Gulfstream Aerospace on October 14,2014, with the G500 rolling under its own power.
Split into simpler sentences: The Gulfstream G500 and G600 (GVII) are Gulfstream twin-engine business jets. They were unveiled by Gulfstream Aerospace on October 14,2014, with the G500 rolling under its own power.