Complex sentence: In 1900, the Cromptons sold their interest in the estate including the hall to William Lever, founder of Lever Brothers, the Hall became a Museum of art work and part of the attractions of Lever Park.
Split into simpler sentences: In 1900, the Cromptons sold their interest in the manor including the hall to William Lever, founder of Lever Brothers. The hall became a Museum of art work and part of the attractions of Lever Park.