Task: Explanation
Input (English): The Frozen Ground is a 2013 American crime thriller drama film directed and written by Scott Walker in his directorial debut, and starring Nicolas Cage, John Cusack, Vanessa Hudgens, Katherine LaNasa, Radha Mitchell and 50 Cent. Based on the crimes of real-life Alaskan serial killer Robert Hansen, the film depicts an Alaskan State Trooper seeking to apprehend Hansen by partnering with a young woman, who escaped from Hansen's clutches. Question: The Frozen Ground was based on the crimes of which American serial killer? Answer: Robert Christian Hansen
Output (English):  Based on the crimes of reallife Alaskan serial killer Robert Hansen, the film depicts an Alaskan State Trooper seeking to apprehend Hansen by partnering with a young woman, who escaped from Hansens clutches.