user: Question: What is the least round for the game played at members equity stadium in from of 12581 people?
Columns: ['Round', 'Date', 'Home Team', 'Away Team', 'Attendance', 'Stadium']
Types: ['real', 'text', 'text', 'text', 'real', 'text']
Sample row: [1.0, '17 August 2008', 'Adelaide United', 'Perth Glory', 10510.0, 'Hindmarsh Stadium']
SQL:

assistant: SELECT MIN("Round") FROM "Table" WHERE "Stadium" = 'members equity stadium' AND "Attendance" < 12581.0;