Complex sentence: The first commercial electrical telegraph was constructed by Sir Charles Wheatstone and Sir William Fothergill Cooke and entered use on the Great Western Railway--it ran for 13 miles from Paddington station to West Drayton and came into operation on 9 April 1839.
Split into simpler sentences: The first commercial electrical telegraph was constructed by Sir Charles Wheatstone and Sir William Fothergill Cooke and entered use on the Great Western Railway. It ran for 13 miles from Paddington station to West Drayton and came into operation on 9 April 1839.