Task: Sentence Expansion
Input (English): The Alexander ALX400 ( later known as the TransBus ALX400 and the Alexander Dennis ALX400 ) is a 2-axle double-decker low-floor bus body .
Output (English): The Alexander ALX400 ( later known as the TransBus ALX400 and the Alexander Dennis ALX400 ) is a 2-axle double-decker bus body built by Walter Alexander Coachbuilders ( later by TransBus International / Alexander Dennis ) .