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

### Instruction:
How many writers had an US air date of september 25, 1993?

### Inputs:
table_name: table, columns: ['No.', '#', 'Title', 'Director', 'Writer', 'US air date', 'Storyteller', 'Villains']

### Response:
SELECT COUNT Writer FROM table WHERE US air date = September 25, 1993