user: Question: How many golds were there for iceland with more than 15 silver?
Columns: ['Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Cyprus', 32.0, 30.0, 20.0, 82.0]
SQL:

assistant: SELECT "Gold" FROM "Table" WHERE "Silver" > 15.0 AND "Nation" = 'iceland';