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

### Instruction:
What is the average population for an area less than 433.7km and a 23013 code?

### Inputs:
table_name: table, columns: ['Place', 'Code', 'Area (km 2 )', 'Population', 'Most spoken language']

### Response:
SELECT AVG Population FROM table WHERE Area (km 2 ) < 433.7 AND Code = 23013