Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the fewest number of silver medals received by a nation who received 40 bronze medals and more than 42 gold medals?

### Inputs:
table_name: table, columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']

### Response:
SELECT MIN Silver FROM table WHERE Bronze = 40 AND Gold > 42