Question: LKS Pogoń Lwów is a former Polish professional sports club which existed from 1904 until the outbreak of a war that lasted until what year?

Context paragraphs:
Czarni Lwów: Czarni Lwów was one of the first Polish professional sports clubs with the well developed football section as well as hockey among the several other sports.  The football club was started in the late 19th century in Lwów as a school football section Sława Lwów.  In 1903 the name was changed and the club became professional.

Pogoń Lwów (1904): LKS Pogoń Lwów is a former Polish professional sports club which was located in Lwów (now Lviv in Ukraine), and existed from 1904 until the outbreak of World War II in 1939.  It was the second oldest Polish football club behind other teams from Lwów – Czarni and Lechia.  With numerous departments, among them football, ice hockey and track and field, Pogoń was a major force of Polish sports in the interbellum period; its football team was never relegated from the elite Polish Football League.  The club ceased to exist in September 1939, following German and Soviet aggression on Poland.  On July 2, 1939, Pogoń played last pre-war official home game, drawing 1–1 with AKS Chorzów.  The last pre-war game of the Pogoń's football team took place in Warsaw on August 20, 1939.  Lwów's side lost 1–2 to Polonia Warszawa, scorer of the last goal was the 20-year-old forward Piotr Dreher.  A club under the same name wishing to continue its traditions was formed in 2009.

Pogoń Lwów (2009): LKS Pogoń Lwów (Ukrainian: Погонь Львів ) is a sports club which was located in Lviv in Ukraine.  It was founded in 2009 by Poles in Ukraine to continue the traditions of the original club of the same name, which was a very successful Polish club when the city was still part of Poland.

Michał Matyas: Michał Franciszek Mieczysław Matyas (28 September 1910, in Brzozów – 22 October 1975, in Kraków) was a Polish football player, who represented such teams as Pogoń Lwów and Polonia Bytom, as well as Poland.

Jan Wasiewicz: Jan Karol Wasiewicz (6 January 1911 in Lwów - 9 November 1976 in Quilmes (a district of Buenos Aires), Argentina) was an interwar Polish soccer player.  Wasiewicz was a midfielder both in Pogoń Lwów (one of the best teams of interwar Poland), and the Polish National Team.

Mieczysław Batsch: Mieczysław Józef Batsch (January 1, 1900 in Lwów – September 9, 1977 in Przemyśl) was a Polish soccer forward.  He represented both Pogoń Lwów and the Polish National Team.

Zygmunt Steuermann: Zygmunt Steuermann (1899–1941) was a Polish football player and one of the most renowned members of the Hasmonea Lwów Football Club.  Born February 5, 1899 in Sambor, then in Austro-Hungarian Galicia, Steuermann was a member of a Polonized Jewish family.  Already at the age of 12 he joined the local Korona Sambor.  During World War I he fled to Vienna, where he continued his training in a variety of sport clubs, including Gersthof Wien, Germania Wien and Amateure Wien.  After the war he returned to Poland and in 1920 started a semi-professional career in Korona Sambor.  During the following year he moved to Lwów (modern Lviv, Ukraine), where he joined the ŻKS Lwów sports club.  In 1923 he was transferred to Hasmonea Lwów, the most important Jewish football club in Poland and one of the four Lwów-based clubs playing in the first league.  He remained one of the most notable players of that club until 1932, when he joined Legia Warsaw.

World War II: World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier.  It involved the vast majority of the world's countries—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis.  It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries.  In a state of total war, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources.

Spirydion Albański: Spirydion Jan Albański (4 October 1907 – 30 March 1992), nicknamed "Spirytus" and "Romek", was a Polish football goalkeeper in the 1930s.  He played for Pogoń Lwów and the Polish National Team.

Józef Garbień: Józef Daniel Garbień (December 11, 1896 — May 3, 1954), was a Polish football striker who played for both Pogoń Lwów and the national team.  He was part of the legendary Pogoń forwards, who in the early 1920s were superior to all opponents in the country.

Supporting paragraphs: Pogoń Lwów (1904) World War II
Answer: 1945