user: Question: What opposition do 31.1% of Social Democrats have?
Columns: ['Polling Firm', 'Date', 'Venstre (V)', 'Social Democrats (A)', "Danish People's Party (O)", "Socialist People's Party (F)", "Conservative People's Party (C)", 'Social Liberal Party (B)', 'Liberal Alliance (I)', 'Red-Green Alliance (Ø)', 'Christian Democrats (K)', 'Government', 'Opposition']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2007 Election', '13 Nov 2007', '26.2%', '25.5%', '13.9%', '13.0%', '10.4%', '5.1%', '2.8%', '2.2%', '0.9%', '53.3%', '46.7%']
SQL:

assistant: SELECT "Opposition" FROM "Table" WHERE "Social Democrats (A)" = '31.1%';