user: Question: what is the least silver when bronze is 1, rank is less than 2 and gold is more than 4?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Russia', 4.0, 1.0, 1.0, 6.0]
SQL:

assistant: SELECT MIN("Silver") FROM "Table" WHERE "Bronze" = 1.0 AND "Rank" < 2.0 AND "Gold" > 4.0;