Complex sentence: The Metropolitan Borough of Southwark was a metropolitan borough in the County of London, created in 1900, as a merger of the parish Vestry Boards of St Saviour, St Mary Newington, St George the Martyr and Christ Church.
Split into simpler sentences: The Metropolitan Borough of Southwark was a metropolitan borough in the County of London. It was created in 1900, as a merger of the parish Vestry Boards of St Saviour, St Mary Newington, St George the Martyr and Christ Church.