Complex sentence: His large circle of friends and acquaintances in London included bankers, merchants, publishers, painters, and actors: he provided Austen with a view of social worlds not normally visible from a small parish in rural Hampshire.
Split into simpler sentences: His large circle of friends and acquaintances in London included bankers, merchants, publishers, painters and actors. He provided Austen with a view of social worlds not normally visible from a small parish in rural Hampshire.