user: Question: What is the low number of top 25s in an event with over 15 appearances?
Columns: ['Tournament', 'Wins', 'Top-5', 'Top-10', 'Top-25', 'Events', 'Cuts made']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Masters Tournament', 0.0, 1.0, 1.0, 2.0, 3.0, 2.0]
SQL:

assistant: SELECT MIN("Top-25") FROM "Table" WHERE "Events" > 15.0;