Question: What is the birth date of this retired professional basketball player and businessman, who was elected commissioner of the Lithuanian Basketball Federation?

Context paragraphs:
Gintaras Einikis: Gintaras Einikis (born September 30, 1969 in Kretinga, Lithuanian SSR, USSR) is a Lithuanian retired professional basketball player and current coach.  He stands at 6 ft 10 in (208 cm) and is former Lithuanian basketball center for the Lithuanian national team.  Einikis is the only player from the Lithuanian national team to have won all three consecutive bronze medals at the Olympics in Barcelona, Atlanta and Sydney.

Lietuvos krepšinio lyga: Lietuvos krepšinio lyga (LKL) ("English": Lithuanian Basketball League) is the premier professional men's basketball league in Lithuania, composed of 10 teams, and a member of the Lithuanian Basketball Federation.  Top LKL clubs are annual participants of the top international competitions in Europe, including the top-tier level EuroLeague.

Modestas Paulauskas: Modestas Paulauskas (19 March 1945) is a Lithuanian basketball coach and retired basketball player.  He is known for being one of the best Lithuanian basketball players of all-time, and for having superior dribbling ability.  He was selected as the Lithuanian Sportsman of the Year a record seven times, in 1965–1967, and 1969–1972.

Andrei Kirilenko: Andrei Gennadyevich Kirilenko (Russian: Андрей Геннадьевич Кириленко ; born February 18, 1981) is a Russian-American retired professional basketball player, currently the commissioner of the Russian Basketball Federation.  One of the most versatile players of his generation, he is considered one of the greatest international players of all time.

Algimantas Pavilonis: Algimantas Pavilonis (born October 20, 1953 in Vilnius) is a retired Lithuanian basketball player, most notable for his playing career in Statyba Vilnius from 1973 to 1985.  He was second Lithuanian Basketball Federation president, serving from 1994 till 2003.  He also was Executive Director for the Northern European Basketball League from 2002 to 2003.

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.

Recep Ankaralı: Recep Ankaralı (born April 10, 1968 in Istanbul, Turkey) is a retired professional basketball referee.  He started his career in 1989 and retired after 2015- 2016 season.  As the end of 2016 season, Ankaralı has officiated more than 1,000 in his career including, Turkish Basketball League, Euroleague, Eurocup, World Championship and Olympics.  Recep Ankaralı is currently President of Turkish Basketball Federation Officiating Committee and also Director of Referees for Turkish Basketball Leagues.

Lithuanian Basketball Federation: Lithuanian Basketball Federation (Lithuanian: "Lietuvos Krepšinio Federacija"), also known as LKF, is a national governing body of basketball in Lithuania.  It was founded in 1936, but due to Soviet occupation, the federation disappeared from FIBA.  It was reinstated in 1991 following the Independence of Lithuania.  In 2011, the famous basketball player Arvydas Sabonis was elected as the commissioner of the federation.

Vladas Garastas: Vladas Garastas (born February 8, 1932 in Linkuva) is a former Lithuanian professional basketball coach and the former president of the Lithuanian Basketball Federation.

Igor Rakočević: Igor Rakočević (; born March 29, 1978) is a retired Serbian professional basketball player.  He is 1.94 m (6 ft 4 ½ in) tall.  A two-time All-EuroLeague Team member and three-time Alphonso Ford Trophy winner, he played at both the point guard and shooting guard positions, but spent the vast majority of his career playing as a shooting guard.  He is the son of Serbian former basketball player Goran Rakočević, who played as a point guard for Crvena zvezda.  Since February 2015, he has been a vice-president of the Basketball Federation of Serbia, in charge of men’s basketball.

Supporting paragraphs: Lithuanian Basketball Federation Arvydas Sabonis
Answer: December 19, 1964