user: Question: What is the highest ranked nation with 15 silver medals and no more than 47 total?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'United States', 22.0, 15.0, 10.0, 47.0]
SQL:

assistant: SELECT MAX("Rank") FROM "Table" WHERE "Silver" = 15.0 AND "Total" < 47.0;