Complex sentence: In the mid 19th century, Lord Stanley, a local philanthropist, funded the building of a larger causeway, known locally as "The Cob", it now carries the A5 and the railway line.
Split into simpler sentences: In the mid 19th century, Lord Stanley, a local philanthropist, funded the building of a larger causeway. Known locally as "The Cob", it now carries the A5 and the railway line.