Question: What was the name of the submachine gun used during World War II, that was designed by Aimo Lahti?
Sentence (from "Suomi KP/-31"): The Suomi KP/-31 (Suomi-konepistooli or "Submachine-gun Finland", literally: "Machine-pistol Finland") was a submachine gun (SMG) of Finnish design used during World War II.
Relevant evidence: Yes