Complex sentence: Early in his performing career, Carell acted on the stage in a touring children's theater company, later in the comedy musical, "Knat Scatt Private Eye" and in a television commercial for Brown's Chicken in 1989.
Split into simpler sentences: Early in his performing career, Carell acted on the stage in a touring children's theater company and later in the comedy musical, "Knat Scatt Private Eye". He also acted in a television commercial for Brown's Chicken in 1989.