Complex sentence: Her first professional experience was in musical theater in 1944, as an ensemble member for four years with the Hollywood Turnabout Puppet Theatre, working alongside Elsa Lanchester; she later joined the national touring company of the musical "Finian's Rainbow" in 1949.
Split into simpler sentences: Her first professional experience was in musical theater in 1944, as an ensemble member for four years with the Hollywood Turnabout Puppet Theatre, working alongside Elsa Lanchester. She later joined the national touring company of the musical "Finian's Rainbow" in 1949.