Complex sentence: The company was taken over by Bass in 1968, then in 2000 Bass sold its brewing operations to the Belgian brewer Interbrew who were ordered by the Competition Commission to sell the Stones brand.
Split into simpler sentences: The company was taken over by Bass in 1968. In 2000, Bass sold its brewing operations to the Belgian brewer Interbrew who were ordered by the Competition Commission to sell the Stones brand.