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

### Instruction:
Silver larger than 0, and a Total smaller than 3, and a Nation of bulgaria, and a Bronze smaller than 0 had what sum of gold?

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

### Response:
SELECT SUM Gold FROM table WHERE Silver > 0 AND Total < 3 AND Nation = bulgaria AND Bronze < 0