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 group of 140 mph -lrb- 225 km / h -rrb- , 4.54 mw / 6,300 hp electric trains ordered as a part of the late 1980s east coast main lines effort to modernize and electrify them.