user: Question: In which season was the average league attendance 2.572?
Columns: ['Season', 'Average Attendance Home', 'Highest Attendance Home', 'Average Attendance Away', 'Highest Attendance Away', 'Division / Section', 'Level', 'Average Attendance League']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2002.0, '7.546', '11.902 vs. Helsingborgs IF', '9.924', '24.570 vs. Malmö FF', 'Allsvenskan', 'Tier 1', '10.180']
SQL:

assistant: SELECT "Season" FROM "Table" WHERE "Average Attendance League" = '2.572';