user: Question: What is the average number of events of pga championship tournaments with a top-5 less than 0?
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, 0.0, 0.0, 3.0, 3.0]
SQL:

assistant: SELECT AVG("Events") FROM "Table" WHERE "Top-10" = 0.0 AND "Tournament" = 'pga championship' AND "Top-5" < 0.0;