Complex sentence: The Hornsby tractors featured a track-steer clutch arrangement, which is the basis of the modern crawler operation, and some say an observing British soldier quipped that it crawled like a caterpillar.
Split into simpler sentences: The Hornsby tractors featured a track-steer clutch arrangement, which is the basis of the modern crawler operation. Some say an observing British soldier quipped that it crawled like a caterpillar.