user: Question: What is the average Gold, when Nation is yugoslavia, and when Silver is greater than 0?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'Soviet Union', 5.0, 2.0, 1.0, 8.0]
SQL:

assistant: SELECT AVG("Gold") FROM "Table" WHERE "Nation" = 'yugoslavia' AND "Silver" > 0.0;