Original sentence: He assumed exclusive control of the film production company in the 1950s, when he secretly purchased his brothers' shares in the business – a move that alienated him from some of his closest relatives.Studios, he worked with his brother, Sam Warner, to develop the film industry's premier "talking picture"
Edited sentence: He assumed exclusive control of the film production company in the 1950s, when he secretly purchased his brothers' shares in the business – a scheme that alienated him from some of his closest relatives.Studios, Jack Warner worked with his brother, Sam Warner, to develop the film industry's premier "talking picture"