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?
Context: Kawhi Anthony Leonard ( , born June 29, 1991) is an American professional basketball player for the San Antonio Spurs of the National Basketball Association (NBA).  He played two seasons of college basketball for San Diego State University before being selected with the 15th overall pick in the 2011 NBA draft by the Indiana Pacers.  He was then traded to San Antonio on draft night.  Leonard won an NBA Championship with the Spurs in 2014 and was named the NBA Finals Most Valuable Player.  He is a two-time NBA Defensive Player of the Year, having won in 2015 and 2016, and is a two-time All-NBA First Team member. The 1977 NBA draft was the 31st annual draft of the National Basketball Association (NBA).  The draft was held on June 10, 1977, before the 1977–78 season.  In this draft, 22 NBA teams took turns selecting amateur U.S. college basketball players and other eligible players, including international players.  The first two picks in the draft belonged to the teams that finished last in each conference, with the order determined by a coin flip.  The Milwaukee Bucks won the coin flip and were awarded the first overall pick, while the Kansas City Kings, who obtained the New York Nets first-round pick in a trade, were awarded the second pick.  The remaining first-round picks and the subsequent rounds were assigned to teams in reverse order of their win–loss record in the previous season.  A player who had finished his four-year college eligibility was eligible for selection.  If a player left college early, he would not be eligible for selection until his college class graduated.  Before the draft, six college underclassmen were declared eligible for selection under the "hardship" rule.  These players had applied and gave evidence of financial hardship to the league, which granted them the right to start earning their living by starting their professional careers earlier.  Four former American Basketball Association (ABA) franchises who joined the NBA when both leagues merged, the Denver Nuggets, the Indiana Pacers, the New York Nets and the San Antonio Spurs, took part in the NBA Draft for the first time.  Prior to the start of the season, the Nets relocated to New Jersey and became the New Jersey Nets.  The draft consisted of 8 rounds comprising the selection of 170 players. Malik Samory Hairston (born February 23, 1987) is an American professional basketball player who last played for Hapoel Jerusalem of the Israeli Premier League.  A shooting guard-small forward from the University of Oregon's Ducks, he was chosen in the 2008 NBA draft by the Phoenix Suns, who then traded him to the San Antonio Spurs.  Hairston has also played with the San Antonio Spurs, the Austin Toros (the Spurs' D-League affiliate), Montepaschi Siena and Olimpia Milano of the Italian League, and Galatasaray of the Turkish League.  He was born in Detroit, Michigan. Patrick Sammy Mills (born 11 August 1988) is an Australian professional basketball player for the San Antonio Spurs of the National Basketball Association (NBA).  Mills is the second Indigenous Australian to play in the NBA (after Nathan Jawai) and is of Torres Strait Islander descent.  Mills was drafted by the Portland Trail Blazers with the 55th overall pick in the 2009 NBA draft after playing college basketball for Saint Mary's College of California.  He also played for the Melbourne Tigers of the National Basketball League and the Xinjiang Flying Tigers of the Chinese Basketball Association during the NBA lockout.  He signed with the San Antonio Spurs in 2012 and won an NBA championship with them in 2014.  He plays the point guard position. Daniel Richard "Danny" Green, Jr. (born June 22, 1987) is an American professional basketball player for the San Antonio Spurs of the National Basketball Association (NBA).  He was a swingman from the University of North Carolina, where he played in more games (145) and had more wins (123) than any Tar Heel before him.  Green is also the only player in the history of the Atlantic Coast Conference (ACC) with at least 1,000 points, 500 rebounds, 250 assists, 150 three-pointers, 150 blocks and 150 steals.  He won an NCAA championship his senior year and was subsequently drafted by the Cleveland Cavaliers with the 46th overall pick in the 2009 NBA draft.  During the 2013 NBA Finals, Green set an NBA record for most three-point field goals made in a Finals series.  He then won an NBA championship with the San Antonio Spurs the following season, and became just the third player from UNC to win an NCAA championship and an NBA championship, the two others being James Worthy, and Michael Jordan.  Known for his perimeter defense and three-point shooting, Green has been a key contributor on both ends on the floor throughout his NBA career, having been selected to his first NBA All-Defensive Second Team in the 2016-17 NBA season. The San Antonio Spurs are a professional basketball team based in San Antonio that competes in the National Basketball Association (NBA).  They were founded in Dallas, Texas as the Dallas Chaparrals, one of the eleven charter franchises of the American Basketball Association (ABA), in 1967.  During the 1970–71 season, in an attempt to make the team a regional one, the name "Dallas" was dropped in favor of "Texas" and some home games were played in Fort Worth and Lubbock, but low attendance figures prompted the team to return full-time to Dallas the following season.  In 1973 the franchise relocated to San Antonio and was renamed the San Antonio Spurs.  Three years later the Spurs were one of four ABA franchises who joined the NBA as a result of the ABA–NBA merger. The 1999 NBA Draft was held on June 30, 1999, at the MCI Center (now Verizon Center) in Washington, D.C.  It was the first draft in which four players from the same college were picked in the first round, with Elton Brand (1st selection), Trajan Langdon (11th), Corey Maggette (13th) and William Avery (14th) being selected out of Duke University.  It 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—Manu Ginóbili, Jason Terry, and Lamar Odom.  Undrafted Pablo Prigioni made his NBA debut at 2012/2013 season as the oldest rookie in league history, at age 35. William Anthony Parker Jr. (born 17 May 1982) is a French professional basketball player for the San Antonio Spurs of the National Basketball Association (NBA).  The son of a professional basketball player, Parker played for two years in the French basketball league before entering the 2001 NBA draft.  He was selected by the San Antonio Spurs with the 28th overall pick in the draft and quickly became their starting point guard.  Parker has won four NBA Championships (2003, 2005, 2007, and 2014), all of which were with the Spurs. The Big Three were a trio of basketball players for the San Antonio Spurs of the National Basketball Association (NBA) from 2002–2016.  The Big Three consisted of Tim Duncan, Tony Parker, and Manu Ginóbili.  Each player of the Big Three was drafted by the San Antonio Spurs and played their entire NBA careers with the San Antonio Spurs.  The Big Three won four NBA Championships during their time together in San Antonio, in 2003, 2005, 2007, and 2014.  The trio is widely regarded as the greatest trio of teammates in NBA history, as they have won over 1,000 games together. Emanuel David "Manu" Ginóbili Maccari (] , born 28 July 1977) is an Argentine professional basketball player for the San Antonio Spurs of the National Basketball Association (NBA).  He is also a member of the Argentine men's national basketball team.  He is one of only two players, along with Bill Bradley, to have won at least a EuroLeague title, an NBA championship, and an Olympic gold medal.
Answer: National Basketball Association (NBA)