Complex sentence: The 1972 Illinois Central Gulf commuter rail crash occurred on October 30,1972 a new lightweight bi-level commuter train inbound to Chicago during the morning rush hour overshot the 27th Street platform and backed up into the station.
Split into simpler sentences: The 1972 Illinois Central Gulf commuter rail crash occurred on October 30,1972. A new lightweight bi-level commuter train inbound to Chicago during the morning rush hour overshot the 27th Street platform and backed up into the station.