CREATE TABLE table_39357 ("Outcome" TEXT, "Year" FLOAT, "Championship" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents in the final" TEXT, "Score in the final" TEXT)

What was the outcome when the oppenent was serena williams venus williams and had a hard surface?
SELECT "Outcome" FROM table_39357 WHERE "Opponents in the final" = 'serena williams venus williams' AND "Surface" = 'hard'
SELECT "Outcome" FROM "table_39357" WHERE "Opponents in the final" = 'serena williams venus williams' AND "Surface" = 'hard'