Question: The club Guðmundur Kristjánsson currently plays for was founded on what date?

Context paragraphs:
Guðmundur Mete: Guðmundur Viðar Mete (born 2 April 1981) is an Icelandic footballer who plays as a defender.  He currently plays for 2.  deild karla side Afturelding.

R.D. Águeda: Recreio Desportivo de Águeda commonly known as simply as Recreio de Águeda is a Portuguese sports club from Águeda, Aveiro.  10 April 1924.  It currently plays at the Estádio Municipal de Águeda which also plays host to the club's reserve and youth teams.  The club currently plays in the Campeonato de Portugal, following promotion from the AF Aveiro First Division in the 2015–16 season.  The club has played once in the Primeira Liga in the 1983–84 season where after one season the club was relegated.

Sport Club Rio Grande: Founded in 1900, Sport Club Rio Grande is Brazil's oldest active football club.  Rio Grande currently plays in the second division of the Campeonato Gaúcho, the regional league of Rio Grande do Sul, which the club won in 1936 - its greatest achievement to date.

LASK Linz: Linzer Athletik-Sport-Klub, commonly known as LASK Linz (] ) or simply LASK, is an Austrian association football club, from the Upper-Austrian state capital Linz.  It is the oldest football club hailing from that region, and currently plays in the Austrian Football Bundesliga, the top tier of Austrian football.  The club's colours are black and white.  The women's football section currently plays in the second highest division of Austrian women's football.

Guðmundur Hólmar Helgason: Guðmundur Hólmar Helgason (born 5 August 1992) is an Icelandic handball player who currently plays for Cesson Rennes and the Icelandic national team.

G.D. Lagoa: Grupo Desportivo da Lagoa, commonly known as Lagoa, is a Portuguese football club from the municipality of Lagoa.  The club was founded in 1971.  The club currently plays at the Estádio Capitão Josino da Costa which holds a seating capacity of 1000.  The club currently plays in the Algarve League First Division after being relegated from the national Third Division in season 2012 – 2013.

IK Start: IK Start is a Norwegian football club from the town of Kristiansand, currently playing in Tippeligaen having been promoted from Adeccoligaen in 2012.  The club was founded on 19 September 1905.  The coach is Steinar Pedersen.  The team plays in yellow jerseys, black shorts and yellow socks at home, and blue jerseys, white shorts and blue socks away.

Guðmundur Kristjánsson: Guðmundur Kristjánsson (born 1 March 1989) is an Icelandic football player, currently playing for Norwegian club Start, having previously played for Icelandic football club Breiðablik.

Estrela de Vendas Novas: Estrela Futebol Clube de Vendas Novas commonly known as simply as Estrela de Vendas Novas is a Portuguese sports club from the city of Vendas Novas, Évora.  The club was founded in 1920.  It currently plays at the Estádio Municipal Vendas Novas which holds a capacity of 650.  The stadium also plays host to the club's reserve and youth team home games.  The club currently plays in the Portuguese Second Division following a ninth-place finish in the 2011–12 season.

U.D. Oliveirense: União Desportiva Oliveirense, commonly known as simply as Oliveirense, is a Portuguese sports club from the city of Oliveira de Azeméis, Aveiro.  The club was founded on 25 October 1922.  The club currently plays at the Estádio Carlos Osório which holds a seating capacity of 4,000.  As a sports club it fields very successful teams in rink hockey and basketball.  Its rink hockey team has won the Taça de Portugal on three occasions whilst its basketball team has won the Portuguese Basketball SuperCup and the Portuguese Basketball Cup.  The club currently plays in the LigaPro.

Supporting paragraphs: Guðmundur Kristjánsson IK Start
Answer: 19 September 1905