Task: Question Generation
Input (English): Passage: On Christmas Eve in Los Angeles, a dispatched LASD Sheriff is shot dead by an armed robber, who early on robbed a convenience store and also killed its African-American owner. The alcoholic, hard-driven LAPD Detective Jerry Beck is tasked with the investigation. While examining police records he comes across a potential suspect named Bobby Burns, who has recently been paroled from a four-year robbery sentence. He and a parole officer go to Burns' home only to find his college student brother, John, who claims he has not seen Bobby and is staying only for the holidays. A man attempts to flee the house and Beck captures him after a chase on foot; he turns out to be one of Burns' friend who is also on parole for armed robbery. The man tells Beck that he last saw Burns driving a maroon Ford Ranch Wagon en route to Bakersfield.
In Arizona, Burns and his goons rob a Mexican bar and kill its patrons. A local police chief informs Beck of the crime and he immediately leaves for Arizona. Beck and the chief head to a ranch alleged to be Burns' hideout. There, Burns and his men attack the officers by firing automatic weapons; they escape driving the Ford. Beck retrieves a cache of documents Burns dropped, which contains white supremacy propaganda, maps, and an address book. Beck leaves for Oklahoma to track down one of the people listed in the book, Reverend Gebhardt, who is the leader of the religious white supremacist organization Aryan Nations. In Oklahoma, Beck is joined by FBI Agent Kressler and they head to Gebhardt's church, where Gebhardt states the entity's aim to cleanse America of its "racial impurities," and denies having seen Burns before. Burns, though, has been hiding near the church and casing the place.
Output (English): What is the name of the group who wants to cleanse America of "racial impurities"?