CREATE TABLE table_63972 ("Year" FLOAT, "Category" TEXT, "Recipients and nominees" TEXT, "Role/Episode" TEXT, "Result" TEXT)

For which Category was Outstanding Main Title Design a Recipient and nominee?
SELECT "Category" FROM table_63972 WHERE "Recipients and nominees" = 'outstanding main title design'
SELECT "Category" FROM "table_63972" WHERE "Recipients and nominees" = 'outstanding main title design'