user: Question: How many silver medals were won when there were 4 gold and 22 in total?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'United States', 28.0, 18.0, 19.0, 65.0]
SQL:

assistant: SELECT SUM("Silver") FROM "Table" WHERE "Gold" = 4.0 AND "Total" = 22.0;