Task: Text Simplification
Input (English): the british rail class 91 is a class of 140 mph -lrb- 225 km / h -rrb- , 4.54mw / 6,300 hp electric locomotives ordered as a component of the east coast main line modernisation and electrification programme of the late 1980s.
Output (English): the british rail class 91 is a class of 140 mph -lrb- 225 km / h -rrb- , 4.54mw / 6,300 hp electric locomotives -lrb- a powered rail vehicle used for pulling trains -rrb- ordered as a part of the east coast main line modernisation -lrb- making modern in the appearance -rrb- and electrification -lrb- the process of powering by electricity -rrb- programme of the late 1980s.