Complex sentence: The theatre opened as the Fox Wilshire Theatre on September 19,1930 and for several decades was one of 20th Century Fox's premiere theaters, serving as a movie palace until a 1981 renovation converted it into a stage venue.
Split into simpler sentences: The theatre opened as the Fox Wilshire Theatre on September 19,1930. For several decades it was one of 20th Century Fox's premiere theaters, serving as a movie palace until a 1981 renovation which converted it into a stage venue.