Complex sentence: With the exception of the section from Bolton to Bury the line is still in use, though Liverpool Exchange closed in the 1970's and was replaced by Liverpool Moorfields on the Merseyrail underground section.
Split into simpler sentences: With the exception of the section from Bolton to Bury the line is still in use. Though Liverpool Exchange closed in the 1970's and was replaced by Liverpool Moorfields on the Merseyrail underground section.