user: Question: Which number of Crowd has an Away team score of 20.11 (131)?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Melbourne', '22.11 (143)', 'North Melbourne', '28.12 (180)', 'MCG', 25704.0, '8 May 1982']
SQL:

assistant: SELECT "Crowd" FROM "Table" WHERE "Away team score" = '20.11 (131)';