Complex sentence: Kennington is a district mostly in Central London, England, with a small part around The Oval classed as South London, mainly within the London Borough of Lambeth, although part of the area is within the London Borough of Southwark.
Split into simpler sentences: Kennington is a district situated in Central London, England, with a small part around The Oval which is classed as South London. It is mainly within the London Borough of Lambeth, although part of the area is within the London Borough of Southwark.