user: Question: What country made the Flieger-Doppelpistole 1919?
Columns: ['Name/ designation', 'Year of intro', 'Country of origin', 'Primary cartridge', 'Major users']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['CSMG', 2000.0, 'Belgium', '9x19mm Parabellum 22mm Grenade', 'n/a']
SQL:

assistant: SELECT "Country of origin" FROM "Table" WHERE "Name/ designation" = 'Flieger-Doppelpistole 1919';