Question: The ban on the horse-collar tackle maneuver in American football was named after what 1980-born University of Oklahoma college football player?
{'answer': 'Roy Williams', 'supporting_facts': [['Horse-collar tackle', 0], ['Horse-collar tackle', 1], ['Horse-collar tackle', 2], ['Horse-collar tackle', 3], ['Roy Williams (safety)', 0], ['Roy Williams (safety)', 1]]}