Complex sentence: According to the church web site St John's dates principally from the 15th century, with use of earlier fabric from the 12th, however, according to "Kelly's Directory", it dates largely from the 14th.
Split into simpler sentences: According to the church web site St John's dates principally from the 15th century, with use of earlier fabric from the 12th. However, according to "Kelly's Directory", it dates largely from the 14th.