user: Question: What is the least amount of prize money when there are 21 events?
Columns: ['Rank', 'Player', 'Country', 'Events', 'Prize money ( $ )']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Vijay Singh', 'Fiji', 23.0, 6601094.0]
SQL:

assistant: SELECT MIN("Prize money ( $ )") FROM "Table" WHERE "Events" = 21.0;