Complex sentence: On Saturday nights the weekly South West Trains service formed by a Class 159 also stables in the station.Sometimes when rail tours start from Penzance railway station they are refuelled at the depot.
Split into simpler sentences: On Saturday nights the weekly South West Trains service formed by a Class 159 also stables in the station. Sometimes rail tours that start from Penzance railway station they are refuelled at the depot.