Complex sentence: In 1964 a passenger train was washed into the sea by huge waves during a cyclone when nearing Dhanushkodi and the Railway tracks and the pier at Dhanushkodi were also destroyed.
Split into simpler sentences: In 1964 a passenger train was washed into the sea by huge waves during a cyclone, when nearing Dhanushkodi. The railway tracks and the pier at Dhanushkodi were also destroyed.