Complex sentence: Following the demise of vaudeville, it was converted into a movie theater and the theater was part of Warner Brothers in the 1940s prior to its sale to Fabian Theaters in 1948.
Split into simpler sentences: Following the demise of vaudeville, it was converted into a movie theater. The theater was affiliated with Warner Brothers in the 1940s prior to its sale to Fabian Theaters in 1948.