Question: What five-time NBA champion makes up half of San Antonio Spurs Twin Towers?
Context: The San Antonio Spurs are an American professional basketball team based in San Antonio, Texas.  They are a member of the Southwest Division of the Western Conference in the National Basketball Association (NBA).  The franchise was founded as the Dallas Chaparrals of the American Basketball Association (ABA) in 1967.  The team suffered from poor attendance and general disinterest by fans in Dallas, and the name "Dallas" was dropped in favor of "Texas" during the 1970–71 season in an attempt to make the team regional.  This also proved to be a failure, and the team returned full-time to use "Dallas" for the 1971–72 season.  The team was put up for sale after missing the playoffs in the 1972–73 season.  The team was acquired by a group of 36 San Antonio businessmen, led by Angelo Drossos and Red McCombs, who relocated the team to San Antonio, Texas and renamed it to Spurs.  In 1976, the ABA folded, threatening the future of San Antonio's sole professional sports franchise.  The NBA, however, decided to admit four ABA teams into the league, including the Spurs, along with the Denver Nuggets, the Indiana Pacers and the New York Nets. LaMarcus Nurae Aldridge (born July 19, 1985) is an American professional basketball player for the San Antonio Spurs of the National Basketball Association (NBA).  The power forward played college basketball for two seasons at the University of Texas.  Aldridge was selected second overall in the 2006 NBA draft.  After spending nine seasons with the Portland Trail Blazers, he signed with the Spurs in 2015.  He has been selected to four All-NBA teams and is a five-time NBA All-Star. 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. Spurs Sports & Entertainment L.L.C. (SS&E) is a San Antonio, Texas based sports & entertainment organization.  The company owns and operates several sporting franchises including the 5-time National Basketball Association (NBA) champions San Antonio Spurs, the Women's National Basketball Association (WNBA)'s San Antonio Stars, AHL's San Antonio Rampage, NBA G League's Austin Spurs, and the USL club San Antonio FC.  SS&E also operates the Bexar County owned multi-purpose facility, AT&T Center. 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. The 2013–14 San Antonio Spurs season was the 47th season of the franchise, their 41st in San Antonio and the 38th in the National Basketball Association (NBA).  They entered the season with an NBA-record ten international players.  This season also marked the first time that the Spurs have made back-to-back Finals appearances, also against the Miami Heat, whom they lost against in last year's NBA Finals in seven games and suffered their first loss in the NBA Finals.  Unlike the previous year, the Spurs avenged their NBA Finals loss and became NBA Champions after defeating Miami in five games, winning their fifth NBA Championship.  The Spurs outscored the Heat in the series by the largest per game average point differential (14.0) in Finals history.  San Antonio's Kawhi Leonard was named the Finals Most Valuable Player (MVP). The Twin Towers II (also known as Twin Towers 2, New Twin Towers, Trump Twin Towers and World Trade Center Phoenix ) was a proposed twin-towered supertall skyscraper complex which would have been located at the World Trade Center site in Manhattan, New York City.  The proposed complex would have replaced the former Twin Towers of the World Trade Center destroyed in the September 11 attacks, restoring the skyline of the city to its former state.  The main design for the proposed complex would feature new landmark twin towers, identical to the originals designed by Minoru Yamasaki, though it would feature 115 stories—5 floors taller than the originals, among other differences.  Beside the towers, an above-ground memorial would have occupied the footprints of the original towers.  The new site would also have featured three 12-story buildings, replacing the original 3, 4 and 5 World Trade Center.  The complex was designed and developed by American architect Herbert Belton and American engineer Kenneth Gardner, and sponsored by businessman and 45th President of the United States, Donald Trump. The San Antonio Rampage are an ice hockey team in the American Hockey League based in San Antonio, Texas.  They are currently the top affiliate of the Colorado Avalanche of the NHL after signing a 5-year affiliation deal prior to the 2015–16 season.  The Rampage are owned by the San Antonio Spurs of the NBA, who purchased a dormant AHL franchise with the NHL's Florida Panthers and moved it to San Antonio.  The Rampage play in the AT&T Center in San Antonio, the same arena as the Spurs. The Twin Towers is a name applied to the combination of Tim Duncan and David Robinson playing as the frontcourt of the San Antonio Spurs from 1997–2003.  Both players were selected first overall by the San Antonio Spurs in their draft years with Robinson's selection coming in the 1987 NBA draft and Duncan's selection coming ten years later and both played their entire careers with the San Antonio Spurs. Timothy Theodore Duncan (born April 25, 1976) is an American retired professional basketball player who played his entire 19-year career with the San Antonio Spurs of the National Basketball Association (NBA).  Widely considered to be the greatest power forward of all time, he is a five-time NBA champion, two-time NBA MVP, three-time NBA Finals MVP, NBA All-Star Game MVP and NBA Rookie of the Year.  He is also a 15-time NBA All-Star and the only player to be selected to both the All-NBA and All-Defensive Teams in all of his first 13 seasons.
Answer: Tim Duncan