CREATE TABLE table_39239 ("Polling Firm" CLOB, "Date" CLOB, "Venstre  ( V ) " CLOB, "Social Democrats  ( A ) " CLOB, "Danish People's Party  ( O ) " CLOB, "Socialist People's Party  ( F ) " CLOB, "Conservative People's Party  ( C ) " CLOB, "Social Liberal Party  ( B ) " CLOB, "Liberal Alliance  ( I ) " CLOB, "Red-Green Alliance  ( \\u00d8 ) " CLOB, "Christian Democrats  ( K ) " CLOB, "Government" CLOB, "Opposition" CLOB)

What opposition do 31.1% of Social Democrats have?
SELECT "Opposition" FROM table_39239 WHERE "Social Democrats (A)" = '31.1%'
SELECT "Opposition" FROM "table_39239" WHERE "Social Democrats (A)" = '31.1%'