user: Question: How many silver for the team with more than 2 bronze and more than 7 gold?
Columns: ['Rank', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'real', 'real', 'real', 'real']
Sample row: [1.0, 7.0, 2.0, 4.0, 13.0]
SQL:

assistant: SELECT SUM("Silver") FROM "Table" WHERE "Bronze" > 2.0 AND "Gold" > 7.0;