user: Question: What is the average number of silver medals with more than 6 gold meals and less than 5 bronze medals?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Russia', 16.0, 12.0, 5.0, 33.0]
SQL:

assistant: SELECT AVG("Silver") FROM "Table" WHERE "Gold" > 6.0 AND "Bronze" < 5.0;