Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Most recently Mary Brogger created a bronze monument to this event, while a streetcar driver intentionally crashed his vehicle into one of the first monuments to this event, created by Johannes Gelert. William Seliger turned state's evidence in the aftermath of this event, and much later Albert Weinert created a monument to this event at Waldheim. August (*) Spies spoke from an open wagon immediately prior to this event. Eight police officers died, leading to the trial of eight anarchists, none of whom had thrown the bomb that led to the police officers' deaths near the McCormick plant. For 10 points, name this 1886 demonstration of striking workers in Chicago.
History