user: Question: What was the average attendance of the 2011 season that had games smaller than 519 with several teams bigger than 14 that were also part of the sport of Association football?
Columns: ['League', 'Sport', 'Season', '# of Teams', 'Games', 'Total attendance', 'Average attendance']
Types: ['text', 'text', 'text', 'real', 'real', 'text', 'real']
Sample row: ['National Football League', 'American football', '2011', 32.0, 254.0, '17124389', 67358.0]
SQL:

assistant: SELECT "Average attendance" FROM "Table" WHERE "Season" = '2011' AND "Games" < 519.0 AND "# of Teams" > 14.0 AND "Sport" = 'Association football';