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

### Instruction:
What is the rank for the episode that premiered on September 12, 1979?

### Inputs:
table_name: table, columns: ['Season', 'Premiere', 'Finale', 'Rank', 'Rating']

### Response:
SELECT Rank FROM table WHERE Premiere = september 12, 1979