Question: Silke Nowitzki (born July 12, 1974 in Würzburg, West Germany) is a German former international basketball player, she is the manager of her brother, Dirk Werner Nowitzki, a German professional basketball player, for the Dallas Mavericks of which organization?
{'answer': 'National Basketball Association', 'supporting_facts': [['Silke Nowitzki', 1], ['Dirk Nowitzki', 0]]}