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

### Instruction:
Which Weight has a Power of kw (hp) at 1,800rpm, and a Name of 9 nc?

### Inputs:
table_name: table, columns: ['Name', 'Cyl.', 'Bore', 'Capacity', 'Power', 'Weight']

### Response:
SELECT Weight FROM table WHERE Power = kw (hp) at 1,800rpm AND Name = 9 nc