Complex sentence: The Waterfall train disaster was a train accident on January 31,2003 near Waterfall, New South Wales, Australia, in which a train derailed, killing seven people on-board including the train driver.
Split into simpler sentences: The Waterfall train disaster is a train accident which happened on January 31,2003 near Waterfall, New South Wales, Australia. The train was derailed, killing seven people on-board including the train driver.