user: Question: What is the largest silver with Gold larger than 4, a Nation of united states, and a Total larger than 26?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Russia', 12.0, 7.0, 11.0, 30.0]
SQL:

assistant: SELECT MAX("Silver") FROM "Table" WHERE "Gold" > 4.0 AND "Nation" = 'united states' AND "Total" > 26.0;