Question: Which basketball player is the older son of the head coach of Vytautas Prienai-Birštonas of the Lithuanian Basketball League (LKL)?

Context paragraphs:
BC Prienai: BC Prienai (Lithuanian: "Krepšinio klubas Prienai" ), also known by the sponsor name BC Vytautas, is a professional basketball club based in Prienai and more recently taking up Birštonas.  They play domestically in Lithuanian Basketball League and also compete in the Baltic Basketball League every year.  During the 2008–09 season, then called Rūdupis they became the champion of the NKL and won the challenge match for a slot in the LKL.  In their debut LKL season Rūdupis took seventh place, while next two seasons brought BC Prienai two bronze LKL medals.  BC Prienai played in EuroCup 2011–12 with moderate success; the team managed to win 3 games out of 6, but nonetheless failed to qualify for the next stage.  More recently, the team has become a strong competitor in domestic tournaments, more than once upsetting teams such as Žalgiris and Lietuvos rytas.

Domantas Šeškus: Domantas Šeskus (born 2 December 1992) is a Lithuanian professional basketball player currently playing for Cognac Basket Ball in France.  He is the older son of coach Virginijus Šeškus.

Virginijus Šeškus: Virginijus Šeškus (born February 8, 1967) is a Lithuanian basketball coach.  He is currently head coach of Vytautas Prienai-Birštonas of the Lithuanian Basketball League (LKL).

Paulius Ivanauskas: Paulius Ivanauskas (born 14 March 1996) is a Lithuanian basketball player for Vytautas Prienai-Birštonas of the Lithuanian Basketball League.

BC Šiauliai: BC Šiauliai (Lithuanian: "Krepšinio klubas Šiauliai" ) is the professional basketball club of Šiauliai, Lithuania.  The club competes in the Lithuanian Basketball League and Baltic Basketball League.  It has won the 3rd place award (behind Lithuanian basketball giants Lietuvos Rytas and Žalgiris) in the LKL a record 9 times.

Robertas Giedraitis: Robertas Giedraitis (born August 29, 1970) is a Lithuanian basketball coach and former player.  He is currently the assistant coach for Šiauliai of the Lithuanian Basketball League (LKL).  Robertas Giedraitis played his whole career with Šiauliai.  He is currently the player with most games played, most steals and the most assists made in Lithuanian Basketball League's history.

Marius Leonavičius: Marius Leonavičius (born August 18 in Prienai, Lithuania) is a Lithuanian basketball coach.  He is currently an assistant coach for the Vytautas Prienai-Birštonas of the Lithuanian Basketball League and the head coach of U15, U13 and U11 teams in Prienai basketball school.

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.

Regimantas Miniotas: Regimantas Miniotas (born 14 March 1996) is a Lithuanian basketball player for Vytautas Prienai-Birštonas of the Lithuanian Basketball League.

Tadas Klimavičius: Tadas Klimavičius (born 10 October 1982) is a Lithuanian professional basketball player for Vytautas Prienai-Birštonas of the Lithuanian Basketball League.  He is a power forward.  He also represented Lithuania national basketball team internationally.

Supporting paragraphs: Domantas Šeškus Virginijus Šeškus
Answer: Domantas Šeskus