user: ### NOW ANSWER:
Question: What is the top-25 of the u.s. open, which has less than 7 events?
Columns: ['Tournament', 'Wins', 'Top-10', 'Top-25', 'Events', 'Cuts made']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Masters Tournament', 0.0, 2.0, 4.0, 6.0, 5.0]
SQL:

assistant: SELECT SUM("Top-25") FROM "Table" WHERE "Tournament" = 'u.s. open' AND "Events" < 7.0;