user: Question: What is the fewest number of silver medals received by a nation who received 40 bronze medals and more than 42 gold medals?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'Norway', 115.0, 94.0, 95.0, 304.0]
SQL:

assistant: SELECT MIN("Silver") FROM "Table" WHERE "Bronze" = 40.0 AND "Gold" > 42.0;