Question: Which Finnish writer was very influential between 1918 and 1939?
Sentence (from "World war"): While a variety of global conflicts have been subjectively deemed "world wars", such as the Cold War and the War on Terror, the term is widely and generally accepted only as it is retrospectively applied to two major international conflicts that occurred during the 20th century: World War I (1914–1918) and World War II (1939–1945).
Relevant evidence: Yes