Complex sentence: Aero Continente Chile operated a fleet of five Boeing 737-200 and one larger Boeing 767-200 aircraft for international flights, all of which had been handed down from mainline Aero Continente.
Split into simpler sentences: Aero Continente Chile operated a fleet that consisted of five Boeing 737-200 and one larger Boeing 767-200. All aircraft had been handed down from mainline Aero Continente.