user: Question: What is the average rank of the airport in São Paulo with passengers totaling less than 18795596?
Columns: ['Rank', 'Location', 'Total Passengers', 'Annual change', 'Capacity in use']
Types: ['real', 'text', 'real', 'text', 'text']
Sample row: [1.0, 'São Paulo', 18795596.0, '19.3%', '113.9%']
SQL:

assistant: SELECT AVG("Rank") FROM "Table" WHERE "Location" = 'São Paulo' AND "Total Passengers" < 18795596.0;