Given the question: Question: Who kills Isabel? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: Dolls Context: Jody Bower (Carrie Lorraine) is an imaginative child on holiday with her annoying father, called David Bower (Ian Patrick Williams), a man only worried about the money of his second wife and Jody's stepmother, Rosemary (Carolyn Purdy-Gordon), a wealthy lady who finds Jody annoying. This lady is so mean that she throws Jody's teddy bear into the bushes - Jody imagines her teddy to become a huge real teddy who kills both her father and stepmother. Their car gets stuck close to a countryside house. Nobody answers when they knock the main door, but a storm breaks out, it's dark, they're lost, tired and cold, so they enter the place through a broken door.When the elderly owners of the house, Gabriel Hartwicke (Guy Rolfe) and Hilary Hartwicke (Hilary Mason), startle them. They are kind, they look like an old-fashioned marriage and they prepare dinner.There are three more people who appear that night at the mansion: two hitchhikers, Enid (Cassie Stuart) and Isabel Prange (Bunty Bailey), who are a kind of punk best friends - Isabel has the look of Madonna in her Who's That Girl? phase - and the childish man who pick them up, a kind young man called Ralph Morris (Stephen Lee). The Hardwickes say that they used to be toy makers. After dinner, they distribute everybody in different bedrooms. Isabel and Enid play loud music in their room, but Ralph is sent to another different room, and Jody is sent to her own room. Hilary gives Jody Mr Punch, a puppet-looking doll. There are weird dolls in every room.Isabel wants to steal the antiquities at the mansion, because Gabriel and Hilary they were old. Isabel is attacked, and bleeds after being pushed against the walls. We never see who the killer is.Jody sees the bloodied body. She tells her parents, but they don't pay any attention to her. She tells Ralph, who dismisses her, until he notices Jody's blood-stained slippers. He goes with Jody to check on Isabel. They don't find the body at first, but when they try to tell Enid, she panics. She blames Ralph, the same as Rosemary...
The answer is:
the dolls