user: Question: On average, what is the number of silver medals for nations ranking higher than 7, with a total of 6 medals and fewer than 2 bronze medals?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Germany', 12.0, 9.0, 8.0, 29.0]
SQL:

assistant: SELECT AVG("Silver") FROM "Table" WHERE "Rank" > 7.0 AND "Total" = 6.0 AND "Bronze" < 2.0;