user: Question: What is the number of Tournament of u.s. open wins with a Top-25 smaller than 4?
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, 0.0, 2.0, 3.0, 7.0, 4.0]
SQL:

assistant: SELECT COUNT("Wins") FROM "Table" WHERE "Tournament" = 'u.s. open' AND "Top-25" < 4.0;