user: Question: What is the average area with Valparaíso as the capital?
Columns: ['Region', 'Province', 'Capital', 'No. of Communes', 'Area', '2002 Population']
Types: ['text', 'text', 'text', 'real', 'real', 'real']
Sample row: ['XV Arica and Parinacota', 'Arica', 'Arica', 2.0, 8726.4, 186488.0]
SQL:

assistant: SELECT AVG("Area") FROM "Table" WHERE "Capital" = 'Valparaíso';