Complex sentence: When Arthur humbly compliments Steve that he believes he will be a great Santa Claus, Steve rudely dismisses Arthur's overture; later, their father shares with Mrs. Claus his grave doubts about his self-identity should he retire.
Split into simpler sentences: When Arthur humbly compliments Steve that he believes he will be a great Santa Claus, Steve rudely dismisses Arthur's overture. Later, their father shares with Mrs. Claus his grave doubts about his self-identity should he retire.