Complex sentence: In 1929 Cliff Edwards was playing at the Orpheum Theater in Los Angeles, California, where he caught the attention of movie producer-director Irving Thalberg, who Metro-Goldwyn-Mayer hired Edwards to appear in early sound movies.
Split into simpler sentences: In 1929 Cliff Edwards was playing at the Orpheum Theater in Los Angeles, California, where he caught the attention of movie producer-director Irving Thalberg. His film company Metro-Goldwyn-Mayer hired Edwards to appear in early sound movies.