user: Question: What is the average Bronze, when Total is 4, and when Silver is less than 2?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'Soviet Union', 5.0, 2.0, 1.0, 8.0]
SQL:

assistant: SELECT AVG("Bronze") FROM "Table" WHERE "Total" = 4.0 AND "Silver" < 2.0;