Complex sentence: The Metropolitan Borough of Battersea was a metropolitan borough of the County of London, England, between 1899 and 1965, when it was combined with parts of the Metropolitan Borough of Wandsworth to form the London Borough of Wandsworth.
Split into simpler sentences: The Metropolitan Borough of Battersea was a metropolitan borough of the County of London of England between 1899 and 1965. In 1965 it was abolished and its area combined with parts of the Metropolitan Borough of Wandsworth to form the London Borough of Wandsworth.