Question: Which part of nothern Europe includes a country whose second year of competitive football was 1921?
Sentence (from "Baltic states"): The Baltic states, also known as the Baltic countries, Baltic republics, Baltic nations, or simply, the Baltics (Estonian: "Balti riigid, Baltimaad" , Latvian: "Baltijas valstis" , Lithuanian: "Baltijos valstybės" ), are the three countries in northern Europe on the eastern coast of the Baltic Sea: Estonia, Latvia and Lithuania.
Relevant evidence: Yes