Complex sentence: Two of the tracks, "Invisible" and "Arrows", were included on "The Loudest Engine", the latter, which was a demo that was recorded in a house in Sydney, was included on the Australian release only.
Split into simpler sentences: Two of the tracks, "Invisible" and "Arrows", were included on "The Loudest Engine". The latter, a demo recorded in a house in Sydney, was included on the Australian release only.