Complex sentence: On 24 December 1975 14 of the 25 carriages on the eastbound train derailed due to a collapsed bogie on the leading carriage, between the remote Nullarbor sidings of Haig and Nurina.
Split into simpler sentences: On 24 December 1975,14 of the 25 carriages on the eastbound train derailed due to a collapsed bogie on the leading carriage. This occurred between the remote Nullarbor sidings of Haig and Nurina.