user: Question: What is the average value for Gold, when the value for Silver is greater than 2, and when the Nation is West Germany?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'East Germany', 17.0, 17.0, 6.0, 40.0]
SQL:

assistant: SELECT AVG("Gold") FROM "Table" WHERE "Silver" > 2.0 AND "Nation" = 'West Germany';