user: Question: What is Austria's maximum area (km2)?
Columns: ['Member countries', 'Population', 'Area (km²)', 'GDP (billion US$)', 'GDP per capita (US$)']
Types: ['text', 'real', 'real', 'text', 'real']
Sample row: ['Austria', 8206524.0, 83871.0, '145.238', 18048.0]
SQL:

assistant: SELECT MAX("Area (km²)") FROM "Table" WHERE "Member countries" = 'Austria';