Question: Who sexually assaulted Alessa? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: Silent Hill Context: Rose and her husband, Christopher Da Silva, are concerned about their adopted daughter, 9-year old Sharon, who has been sleepwalking while calling the name of a town, "Silent Hill". Desperate for answers, Rose takes Sharon to Silent Hill. As they approach the town, she is pursued by police officer Cybil Bennett, who has become suspicious of Rose's motives after witnessing Sharon panic at a gas station when her drawings are mysteriously vandalized. A mysterious child appears in the road, causing Rose to swerve and crash the car, knocking herself unconscious. When she awakens, Sharon is missing, while fog and falling ash blanket the town. Rose wanders the empty streets of Silent Hill looking for her daughter but is stopped when, upon the sound of a siren, the town transforms into a dark and distorted alternate version of itself, and she encounters a large group of disfigured monsters, including the Janitor in a school bathroom after digging out a piece of wood from the fog world's janitor's mouth. When the town reverts to its normal state, she meets a woman named Dahlia Gillespie, who speaks of her own daughter, Alessa, being abused by the townspeople. Upon seeing a photo of Sharon in Rose's locket, Dahlia mistakes Sharon for Alessa, and tries to steal the necklace from Rose. Rose returns to her car and runs into Cybil, who arrests her. As they head back to the road out of the city, they discover that the road is cut by a huge fracture. The two women eventually pair up to search for Sharon, experiencing Silent Hill's surreal dark side together and barely escape a tall sword-wielding figure called Pyramid Head. Meanwhile, Christopher also simultaneously scours the town, shown to be abandoned and without mist and falling ash as it is to Rose and Cybil, with the assistance of officer Thomas Gucci, who is there in search of the missing Cybil. Christopher discovers documents revealing that the town was abandoned after a coal seam fire thirty years ago, along with a photograph of Dahlia's daughter, who is identical...

Colin