Question: Which nation did the NBA All-Star, part of the Cavaliers-Warriors rivalry and NBA's most valuable player in 2015, represent at the 2012 Summer Olympics?
Context: The 1951 NBA All-Star Game was an exhibition basketball game played on March 2, 1951, at Boston Garden in Boston, Massachusetts, home of the Boston Celtics.  The game was the first edition of the National Basketball Association (NBA) All-Star Game and was played during the 1950–51 NBA season.  The idea of holding an All-Star Game was conceived during a meeting between NBA President Maurice Podoloff, NBA publicity director Haskell Cohen and Boston Celtics owner Walter A. Brown.  At that time, the basketball world had just been stunned by the college basketball point-shaving scandal.  In order to regain public attention to the league, Cohen suggested the league to host an exhibition game featuring the league's best players, similar to the Major League Baseball's All-Star Game.  Although most people, including Podoloff, were pessimistic about the idea, Brown remained confident that it would be a success.  He even offered to host the game and to cover all the expenses or potential losses incurred from the game.  The Eastern All-Stars team defeated the Western All-Stars team 111–94.  Boston Celtics' Ed Macauley was named as the first NBA All-Star Game Most Valuable Player Award.  The game became a success, drawing an attendance of 10,094, much higher than that season's average attendance of 3,500. Kevin Wayne Durant (born September 29, 1988) is an American professional basketball player for the Golden State Warriors of the National Basketball Association (NBA).  He has won an NBA championship, an NBA Most Valuable Player Award, the Bill Russell NBA Finals Most Valuable Player Award, the NBA All-Star Game Most Valuable Player Award, four NBA scoring titles, the NBA Rookie of the Year Award, and two Olympic gold medals.  Durant has also been selected to seven All-NBA teams and eight NBA All-Star teams. Christopher Emmanuel Paul (born May 6, 1985) is an American professional basketball player for the Houston Rockets of the National Basketball Association (NBA).  He has won the NBA Rookie of the Year Award, an NBA All-Star Game Most Valuable Player Award, two Olympic gold medals, and led the NBA in assists four times and steals six times.  He has also been selected to nine NBA All-Star teams, eight All-NBA teams, and nine NBA All-Defensive teams. Jerry Ray Lucas (born March 30, 1940) is an American former basketball player and memory education expert.  He was a nationally-awarded high school player, national college star at Ohio State, and 1960 gold medal Olympian and international player before starring as a professional player in the National Basketball Association (NBA).  As a collegian, Lucas led the Ohio State Buckeyes to the 1960 college national championship and three straight NCAA finals.  He remains today the only three-time Big Ten Player of the Year, and was also twice named NCAA Player of the Year.  As a professional, Lucas was named All-NBA First Team three times, a NBA All-Star seven times, was 1964 NBA Rookie of the Year, and was named Most Valuable Player of the 1965 NBA All-Star Game among other honors and awards.  He was inducted to the Naismith Memorial Basketball Hall of Fame in 1980. The 2013–14 NBA season was the 68th season of the National Basketball Association (NBA).  The regular season began on Tuesday, October 29, 2013 with the Indiana Pacers hosting a game against the Orlando Magic followed by the 2012–13 NBA champions Miami Heat hosting a game against the Chicago Bulls followed by the Los Angeles Lakers hosting a game against the Los Angeles Clippers.  The 2014 NBA All-Star Game was played on February 16, 2014, at the Smoothie King Center in New Orleans.  Cleveland's Kyrie Irving won the NBA All-Star Game Most Valuable Player Award.  The regular season ended on April 16, 2014, and the playoffs began on Saturday, April 19, 2014 and ended on June 15, 2014 with the San Antonio Spurs defeating the Miami Heat in five games to win the 2014 NBA Finals. The 2014–15 NBA season was the 69th season of the National Basketball Association (NBA).  The NBA draft took place on June 26, 2014, at Barclays Center in Brooklyn, where Andrew Wiggins was selected first overall.  The regular season began on Tuesday, October 28, 2014, when the defending NBA champions San Antonio Spurs hosted the first game against the Dallas Mavericks.  Christmas games were played on Thursday, December 25, 2014.  The 2015 NBA All-Star Game was played on Sunday, February 15, 2015, at Madison Square Garden in New York City, with the West defeating the East 163-158.  Oklahoma City's Russell Westbrook won the NBA All-Star Game Most Valuable Player Award.  The regular season ended on Wednesday April 15, 2015 and the playoffs began on Saturday, April 18, 2015 and ended with the 2015 NBA Finals on June 16, 2015, after the Golden State Warriors defeated the Cleveland Cavaliers in six games to win their fourth NBA title. The Cavaliers–Warriors rivalry is a National Basketball Association (NBA) rivalry between the Cleveland Cavaliers and the Golden State Warriors.  While the two teams have played each other since the Cavaliers joined the league in 1970, their rivalry did not develop until the 2014–15 season, when they met in the first of three consecutive NBA Finals series.  The two teams have met in three straight NBA Finals, becoming the only two teams in NBA history to do so.  Of these three series, the Warriors have won two, most recently in 2017the Cavaliers have won one, in 2016.  The two teams feature 11 NBA All-Stars: LeBron James, Kyrie Irving, Kevin Love, Deron Williams and Kyle Korver (Cleveland), and Stephen Curry, Kevin Durant, Draymond Green, Klay Thompson, David West and Andre Iguodala (Golden State).  Two players, Andrew Bogut and Anderson Varejão, played for both teams during this time. Andre Tyler Iguodala ( ; born January 28, 1984) is an American professional basketball player for the Golden State Warriors of the National Basketball Association (NBA).  The swingman was an NBA All-Star in 2012 and has been named to the NBA All-Defensive Team twice.  Iguodala won an NBA championship with the Warriors in 2015, when he was named the NBA Finals Most Valuable Player.  Iguodala helped the Warriors return to the NBA Finals for a third straight year in 2017, winning his second NBA Championship.  He was also a member of the United States national team at the 2010 FIBA World Championship and 2012 Summer Olympics, winning the gold medal both times. Russell Westbrook III (born November 12, 1988) is an American professional basketball player for the Oklahoma City Thunder of the National Basketball Association (NBA).  He is a six-time NBA All-Star, and a two-time NBA All-Star Game Most Valuable Player, winning consecutive awards in 2015 and 2016.  He is also a six-time All-NBA Team member and led the league in scoring in 2014–15 and 2016–17.  In 2017, Westbrook became one of two players in NBA history to average a triple-double for a season, along with Oscar Robertson in 1962.  He also set a record for the most triple-doubles in a season, with 42.  He was subsequently named the 2016–17 NBA Most Valuable Player. The 2016 NBA All-Star Game was an exhibition basketball game that was played on February 14, 2016.  It was the 65th NBA All-Star Game.  The Western Conference won 196–173 over the Eastern Conference, and Russell Westbrook was named the NBA All-Star Game Most Valuable Player (MVP).  It was held at Air Canada Centre in Toronto, home of the Toronto Raptors.  The Raptors were awarded the All-Star Game in an announcement on September 30, 2013.  This was the first time that the game was held outside the United States.  TSN and Sportsnet televised the game nationally in Canada, while TNT and TBS televised the game nationally in the United States.  This was also the 18th and final All-Star Game in which Kobe Bryant participated, as a result of his retirement after the 2015–16 season.
Answer: United States