Question: The 1999 NBA Draft was held on June 30, 1999, at the MCI Center (now Verizon Center) in Washington, D.C., and is widely viewed as one of the best draft classes, with a total of nine future NBA All-Stars being chosen, as well as three winners of the NBA Sixth Man of the Year Award, including Manu Ginóbili, an Argentine professional basketball player for the San Antonio Spurs, of which organization?
Answer: National Basketball Association (NBA)