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

### Instruction:
What is the average Margin that has a Round of 13. (h)?

### Inputs:
table_name: table, columns: ['Round', 'St Kilda Saints', 'Opposition', 'Their Score', 'Margin']

### Response:
SELECT AVG Margin FROM table WHERE Round = 13. (h)