Question:  East Karelian concentration camps were organized by a Finnish military leader who served as commander-in-chief of Finland's defence forces during what war?
Sentence (from "Mannerheimintie"): Mannerheimintie (Swedish: "Mannerheimvägen" ), named after the Finnish military leader and statesman Carl Gustaf Emil Mannerheim, is the main street of Helsinki, Finland.
Relevant evidence: No