user: Question: How many players were in the event after 2011 with less than 9 aces?
Columns: ['!Aces', 'Player', 'Opponent', 'Round', 'Year', 'Event', 'Surface', 'Sets']
Types: ['real', 'real', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: [1.0, 113.0, 'W', 'Nicolas Mahut', '1R', 2010.0, 'Wimbledon', 'Grass']
SQL:

assistant: SELECT COUNT("Player") FROM "Table" WHERE "Event" > 2011.0 AND "!Aces" < 9.0;