CREATE TABLE table_12285 ("Outcome" CLOB, "Date" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

Who was the opponent on 19 February 2011?
SELECT "Opponent" FROM table_12285 WHERE "Date" = '19 february 2011'
SELECT "Opponent" FROM "table_12285" WHERE "Date" = '19 february 2011'