Complex sentence: Westminster is a central London area, within the City of Westminster lying on the River Thames'north bank, centred southwest by west from the City of London's St Paul's Cathedral, and locally southwest by south from Charing Cross.
Split into simpler sentences: Westminster is a central London area, within the City of Westminster. Laying on the River Thames'north bank, centred southwest by west from the City of London's St Paul's Cathedral, and locally southwest by south from Charing Cross.