Complex sentence: Her first novel, "The World of Henry Orient", inspired by her experiences at the Brearley School, was published in 1956, and was made into a motion picture starring Peter Sellers in 1964.
Split into simpler sentences: Her first novel, "The World of Henry Orient", was published in 1956. It was based on her experiences at the Brearley School, and was made into a motion picture starring Peter Sellers in 1964.