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

### Instruction:
Which Crude death rate (per 1000) has Deaths of 768, and a Crude birth rate (per 1000) smaller than 29.7?

### Inputs:
table_name: table, columns: ['Average population (x 1000)', 'Live births', 'Deaths', 'Natural change', 'Crude birth rate (per 1000)', 'Crude death rate (per 1000)', 'Natural change (per 1000)']

### Response:
SELECT MIN Crude death rate (per 1000) FROM table WHERE Deaths = 768 AND Crude birth rate (per 1000) < 29.7