Question: Roland Harper, is a former professional American football player who played running back for eight seasons for the Chicago Bears, he was a starting fullback known in his playing days as a punishing blocker who opened holes in opposing defenses for which star halfback, and an American football running back who played for the Chicago Bears of the National Football League (NFL) for thirteen seasons?
{'answer': 'Walter Jerry Payton', 'supporting_facts': [['Roland Harper', 2], ['Walter Payton', 0]]}