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

### Instruction:
How many basketball arenas are there that belong to a school with a capacity of 3,000?

### Inputs:
table_name: table, columns: ['School', 'Baseball stadium', 'Softball stadium', 'Basketball arena', 'Capacity']

### Response:
SELECT COUNT Basketball arena FROM table WHERE Capacity = 3,000