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

### Instruction:
What is the yield in NTS Area U2R when the purpose is weapons development?

### Inputs:
table_name: table, columns: ['Name', 'Location', 'Elevation + Height', 'Delivery', 'Purpose', 'Yield']

### Response:
SELECT Yield FROM table WHERE Purpose = weapons development AND Location = nts area u2r