Complex sentence: In 1870, the caterers Spiers and Pond decided to develop the site of a seventeenth century posting inn, The White Bear, an area of sloping ground stretching between Jermyn Street and Piccadilly Circus, known as Regent Circus.
Split into simpler sentences: In 1870, the caterers Spiers and Pond decided to develop the site of a seventeenth-century posting inn called the White Bear. The inn was located on an area of sloping ground stretching between Jermyn Street and Piccadilly Circus, known as Regent Circus.