Complex sentence: The porch at St Wulfram's Church, Grantham, like many others of the period, has a room above the porch, which once provided lodging for the priest but now houses Francis Trigge Chained Library.
Split into simpler sentences: The porch at St Wulfram's Church, Grantham, like many others of the period, has a room above the porch. It once provided lodging for the priest, but now houses Francis Trigge Chained Library.