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

### Instruction:
What is Matt Allen's sail number?

### Inputs:
table_name: table, columns: ['Position', 'Sail Number', 'Yacht', 'State/Country', 'Yacht Type', 'LOA (Metres)', 'Skipper', 'Elapsed Time d:hh:mm:ss']

### Response:
SELECT Sail Number FROM table WHERE Skipper = Matt Allen