user: Question: What is the 2009 estimate population of the region with Manaus as the largest city?
Columns: ['Name', 'Population (2009 estimate)', 'Largest City', 'Largest Metropolitan Area', 'Number of States']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['North', '15,8 million', 'Manaus', 'Manaus metropolitan area', '7']
SQL:

assistant: SELECT "Population (2009 estimate)" FROM "Table" WHERE "Largest City" = 'Manaus';