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

### Instruction:
What is the least amount of prize money when there are 21 events?

### Inputs:
table_name: table, columns: ['Rank', 'Player', 'Country', 'Events', 'Prize money ( $ )']

### Response:
SELECT MIN Prize money ( $ ) FROM table WHERE Events = 21