user: Question: Name the gdp world rank for asian rank being 20
Columns: ['Asian rank', 'World rank', 'Country', 'GDP per capita', 'GDP world rank']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 1.0, 'Qatar', '$85,638', '69']
SQL:

assistant: SELECT "GDP world rank" FROM "Table" WHERE "Asian rank" = 20.0;