Question: What is the nationality of a basketball player who competed in the 1988 Summer Olympics and won the ACB Finals Most Valuable Player Award twice?

Context paragraphs:
List of career achievements by Kobe Bryant: Kobe Bryant is an American retired shooting guard who played for the Los Angeles Lakers of the National Basketball Association (NBA) for his entire 20-year career.  Bryant is the only son of former Philadelphia 76ers player and former Los Angeles Sparks head coach Joe Bryant.  Selected 13th overall by the Charlotte Hornets in the 1996 NBA draft, Bryant was traded to the Los Angeles Lakers for Vlade Divac a month later.  He and then-teammate Shaquille O'Neal led the Lakers to three consecutive NBA championships from 2000 to 2002.  After O'Neal was traded to the Miami Heat following the 2003–04 season, Bryant became the cornerstone of the Lakers franchise.  He led the NBA in scoring during the and seasons.  In 2006, Bryant scored a career-high 81 points against the Toronto Raptors, the second-highest number of points scored in a game in NBA history, behind only Wilt Chamberlain's 100 point performance.  Bryant was awarded the regular season's Most Valuable Player Award (MVP) in the 2007–08 season and led his team to the 2008 NBA Finals as the first seed in the Western Conference.  In the 2008 Summer Olympics, he won a gold medal as a member of the U.S. men's basketball team, occasionally referred to as "The Redeem Team".  He led the Lakers to two more championships in 2009 and 2010, winning the Finals MVP award on both occasions.

Frédéricque Rufin Goporo: Frédéricque Rufin Goporo (born 8 August 1966) is a basketball player from the Central African Republic.  He was elected Most Valuable Player at the FIBA Africa Championship 1987, a tournament his team won.  He competed at the 1988 Summer Olympics with the Central African Republic national basketball team.  Goporo was one of the key players on the 10th place team as he scored in double digits for 6 out of the team's 7 games.  He also coached the team from 2012-2013.

2015 ACB Finals: The 2015 ACB Finals was the championship series of the 2014–15 season of the Liga ACB and the conclusion of the season's playoffs.  Real Madrid defeated FC Barcelona in three games (3–0) for the Madrid' seventeenth ACB title and their thirty-second league in team history.  Madrid's Sergio Llull was named the Finals Most Valuable Player (MVP).

Kevin Durant: 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.

Arvydas Sabonis: Arvydas Romas Sabonis (born December 19, 1964) is a Lithuanian retired professional basketball player and businessman.  Recognized as one of the best European players of all time, he won the Euroscar six times, and the Mr. Europa Award twice.  He played in a variety of leagues, and spent seven seasons in the National Basketball Association (NBA) in the United States.  Playing the center position, Sabonis won a gold medal at the 1988 Summer Olympics in South Korea for the Soviet Union, and later earned bronze medals at the 1992 and 1996 games representing Lithuania.  He retired from professional basketball in 2005.

Ken Wilburn: Kenneth "Ken" Wilburn (born June 8, 1944) is an American former professional basketball player.  After setting the career scoring record at Central State University and leading his team to an NAIA championship, he played in the NBA, the ABA, the EPBL, and the EBA.  The EPBL and EBA both later became the Continental Basketball Association.  Wilburn was a three-time EPBL/EBA champion with the Allentown Jets, and he won the EPBL Most Valuable Player award in 1968 while with the Trenton Colonials as well as the EBA Most Valuable Player award while with the Allentown Jets in 1974.

BBL Most Valuable Player Award: The British Basketball League Most Valuable Player award is an annual award of the United Kingdom's top professional basketball league, the British Basketball League.  It is awarded to the league's top performing player throughout the duration of the season.  The award is decided by a panel consisting of each of the League’s team's head coaches who submit one vote each at the end of the regular season, and the player with the most votes is presented with the award.  Only on one occasion - the 2006–2007 season - has the award been shared between two players (Jeff Bonds and Brian Dux) due to a tie in the voting.  Four players - Alton Byrd, Tony Dorsey, Trey Moore and Andrew Sullivan - have won the award twice, whilst only two British-born players have won the award, namely Roger Huggins and two-time winner Sullivan.

ACB Finals Most Valuable Player Award: The ACB Finals Most Valuable Player Award is an award for the top-tier professional basketball league in Spain, the Spanish ACB League.  The ACB first named a Finals Most Valuable Player after the 1990–91 ACB season.  Since then, only three players have won the award more than once: Arvydas Sabonis (2 times), Juan Carlos Navarro (3 times) and Felipe Reyes (2 times).  Historically, the MVP of the ACB Finals usually goes to the player on the winning team that has the highest Performance Index Rating stat over the course of the Finals series.

CBA Most Valuable Player: The Chinese Basketball Association (CBA) MVP is the annual award that is handed out at the end of each Chinese Basketball Association (CBA) regular season to the league's most valuable player.  From the league's inaugural 1995–96 season until the 2011–12 season, only Chinese/Taiwanese players were eligible to win the award.  Since the 2012–13 season, separate awards for both domestic and international players are handed out.  Domestic players are eligible to win the CBA Domestic Most Valuable Player award, while international players are eligible to win the CBA International Most Valuable Player award.

ACB Most Valuable Player Award: The ACB Most Valuable Player Award is an award for the top-tier professional basketball league in Spain, the Spanish ACB League.  The ACB first named a Most Valuable Player after the 1991–92 ACB season.  Since then, four players have won the award more than once: Darryl Middleton (3-time winner), Arvydas Sabonis, Tanoka Beard, and Luis Scola (2-time winners).  Additionally, only five Spanish players have won the award: Juan Carlos Navarro, Marc Gasol, Felipe Reyes, Fernando San Emeterio, and naturalized Spanish player Nikola Mirotić.  The award is voted on by coaches, players, fans (through online voting), and the media.

Supporting paragraphs: ACB Finals Most Valuable Player Award Arvydas Sabonis
Answer: Lithuanian