Question: Who bites Duff? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: Stealing Harvard Context: John Plummer (Jason Lee) is engaged to Elaine Warner (Leslie Mann), and intends to use his life savings of $30,000 to put a down payment on a house. He works for Elaine's father, Mr. Warner (Dennis Farina), who dislikes John. Simultaneously, John's niece Noreen (Tammy Blanchard), daughter of sister Patty (Megan Mullally), is accepted to Harvard University, but needs an additional $30,000 on top of her grants and scholarships. Noreen shows John an old videotape where he promised to pay for Noreen's college. John now has a moral and financial dilemma disappoint his fiancee or disappoint his niece and ruin her chance at escaping poverty. John confides in his friend Walter "Duff" Duffy (Tom Green), a landscaper. He convinces John to steal from one of his rich clients, who keeps large amounts of cash in an unlocked safe. The pair set off to steal the cash, but Duff runs away when lights come on in the home, leaving John to get caught by Emmett Cook (Richard Jenkins). Cook forces John to cross-dress and role-play the part of Cook's late wife as the two men lie in bed and "spoon". Eventually, after taking an incriminating photograph of John, Cook releases him. As he is leaving, Mr. Warner rides by and takes note of John's panicked behavior, believing that he has caught John in an affair. Further capers ensue as John and Duff try to rob a liquor store and later attempt to con a drug lord out of $30,000 by concocting a phony story about running an ecstasy ring. A police detective (John C. McGinley) is on to John and Duff, but never has enough evidence to actually pin any of the crimes on them. Meanwhile, Mr. Warner breaks into Cook's residence in order to get evidence against John, and once Cook catches him, he is forced to "spoon" as well. Before leaving, Warner finds the photo of John from the album, which he then gives to Elaine. John is forced to confess everything to Elaine, who is not upset and admires the lengths he was willing to go to in order to please her and send his niece to Harvard. Elaine then...
The answer to this question is:
Rex