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

### Instruction:
What is the average Season, when First Broadcast is January 23, 1981?

### Inputs:
table_name: table, columns: ['Title', 'Season', 'Director', 'Teleplay', 'First Broadcast']

### Response:
SELECT AVG Season FROM table WHERE First Broadcast = january 23, 1981