CREATE TABLE table_20673 ("State" TEXT, "Preliminary Average" TEXT, "Interview" TEXT, "Swimsuit" TEXT, "Evening Gown" TEXT, "Semifinal Average" TEXT)

What was the evening gown score for the one who had a preliminary average of 8.121 (8)?
SELECT "Evening Gown" FROM table_20673 WHERE "Preliminary Average" = '8.121 (8)'
SELECT "Evening Gown" FROM "table_20673" WHERE "Preliminary Average" = '8.121 (8)'