CREATE TABLE table_7809 ("State" TEXT, "Preliminary Average" TEXT, "Interview" TEXT, "Swimsuit" TEXT, "Evening Gown" TEXT, "Semifinal Average" TEXT)

what is the preliminary average score when the evening gown score is 8.774 (6)?
SELECT "Preliminary Average" FROM table_7809 WHERE "Evening Gown" = '8.774 (6)'
SELECT "Preliminary Average" FROM "table_7809" WHERE "Evening Gown" = '8.774 (6)'