user: Question: What is the least amount of silvers for a team with less than 4 golds and less than 5 total medals?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Norway', 6.0, 6.0, 2.0, 14.0]
SQL:

assistant: SELECT MIN("Silver") FROM "Table" WHERE "Total" < 5.0 AND "Gold" < 4.0;