CREATE TABLE table_70304 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Partner" CLOB, "Opponents in the final" CLOB, "Score" CLOB)

What was the surface for the game that was played on 12-Apr-2005?
SELECT "Surface" FROM table_70304 WHERE "Date" = '12-apr-2005'
SELECT "Surface" FROM "table_70304" WHERE "Date" = '12-apr-2005'