CREATE TABLE table_69409 ("!Race name" FLOAT, "Grade" TEXT, "Racecourse" TEXT, "Distance" TEXT, "Priority-entry-rights to Derby" TEXT)

What is the Grade that has Turf 1600m?
SELECT "Grade" FROM table_69409 WHERE "Priority-entry-rights to Derby" = 'turf 1600m'
SELECT "Grade" FROM "table_69409" WHERE "Priority-entry-rights to Derby" = 'turf 1600m'