user: Question: What is the average Bronze, when Silver is 0, when Rank is 19, and when Total is greater than 2?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'South Korea', 4.0, 4.0, 4.0, 12.0]
SQL:

assistant: SELECT AVG("Bronze") FROM "Table" WHERE "Silver" = 0.0 AND "Rank" = '19' AND "Total" > 2.0;