user: Question: In Which rank was there a location of Porto Alegre?
Columns: ['Rank', 'Location', 'Total Passengers', 'Annual change', 'Capacity in use']
Types: ['real', 'text', 'real', 'text', 'text']
Sample row: [1.0, 'São Paulo', 13611227.0, '12.8%', '113.4%']
SQL:

assistant: SELECT "Rank" FROM "Table" WHERE "Location" = 'Porto Alegre';