Complex sentence: Instead, he was drawn to the theater, first appearing on stage professionally in 1934, And then his acting career began on stage in London in 1935 He also performed with Orson Welles's Mercury Theatre.
Split into simpler sentences: Instead, he was drawn to the theater, first appearing on stage professionally in 1934. His acting career began on stage in London in 1935, and he performed with Orson Welles's Mercury Theatre.