user: Question: Which stadiums have an average attendance of 13840?
Columns: ['Team', 'Stadium', 'Capacity', 'Lowest', 'Highest', 'Average']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['Celtic', 'Celtic Park', 60832.0, 45000.0, 60000.0, 56676.0]
SQL:

assistant: SELECT "Stadium" FROM "Table" WHERE "Average" = 13840.0;