Complex sentence: In May 1998 Loews Theatres merged with Cineplex Odeon Corporation to form Loews Cineplex Entertainment, which is one of the largest movie theatre exhibitors in the world with theatres in the United States, Canada, Mexico, Korea, and Spain.
Split into simpler sentences: In May 1998 Loews Theatres merged with Cineplex Odeon Corporation to form Loews Cineplex Entertainment. The company is one of the largest movie theatre exhibitors in the world with theatres in the United States, Canada, Mexico, Korea, and Spain.