user: Question: What is the average total number of medals for a nation with 2 silver medals and a rank larger than 7?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Russia', 10.0, 14.0, 8.0, 32.0]
SQL:

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