user: Question: What is the average bronze with a rank of 4 and less than 1 silver?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Russia', 10.0, 7.0, 8.0, 25.0]
SQL:

assistant: SELECT AVG("Bronze") FROM "Table" WHERE "Rank" = 4.0 AND "Silver" < 1.0;