user: Question: What is the highest number of silvers for ranks over 7?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'East Germany (GDR)', 12.0, 10.0, 8.0, 30.0]
SQL:

assistant: SELECT MAX("Silver") FROM "Table" WHERE "Rank" > 7.0;