CREATE TABLE table_64109 ("Date Released" CLOB, "Polling institute" CLOB, "Socialist" CLOB, "Social Democratic" CLOB, "Green-Communist" CLOB, "People's Party" CLOB, "Left Bloc" CLOB, "Lead" CLOB)

What is the social democrat released on October 10, 1999?
SELECT "Social Democratic" FROM table_64109 WHERE "Date Released" = 'october 10, 1999'
SELECT "Social Democratic" FROM "table_64109" WHERE "Date Released" = 'october 10, 1999'