Question: Who was the  American professional basketball player for the Dallas Mavericks of the National Basketball Association (NBA) that read and spoke positively of The 21 Irrefutable Laws of Leadership: Follow Them and People Will Follow You?
{'answer': 'Harrison Barnes', 'supporting_facts': [['The 21 Irrefutable Laws of Leadership', 0], ['The 21 Irrefutable Laws of Leadership', 6], ['Harrison Barnes', 0]]}