Complex sentence: Fierlinger formed AR&T Associates, Inc., his own animation house in 1971: initially to produce animated segments for ABC's Harry Reasoner specials and PBS Sesame Street, including the popular Teeny Little Super Guy series.
Split into simpler sentences: Fierlinger formed AR&T Associates, Inc., his own animation house, in 1971. It produced animated segments for ABC's Harry Reasoner specials and PBS Sesame Street, including the popular Teeny Little Super Guy series.