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

### Instruction:
What is the smallest gold value that has a total over 15 and bronze values under 31?

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

### Response:
SELECT MIN Gold FROM table WHERE Total > 15 AND Bronze < 31