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?
Sentence (from "Pogoń Lwów (1904)"): Lwów's side lost 1–2 to Polonia Warszawa, scorer of the last goal was the 20-year-old forward Piotr Dreher.
Relevant evidence: No