For which Category was Outstanding Main Title Design a Recipient and nominee?
CREATE TABLE table_63972 (
    "Year" real,
    "Category" text,
    "Recipients and nominees" text,
    "Role/Episode" text,
    "Result" text
)
SELECT "Category" FROM table_63972 WHERE "Recipients and nominees" = 'outstanding main title design'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: For which Category was Outstanding Main Title Design a Recipient and nominee? ### Input: CREATE TABLE table_63972 (
    "Year" real,
    "Category" text,
    "Recipients and nominees" text,
    "Role/Episode" text,
    "Result" text
) ### Response: SELECT "Category" FROM table_63972 WHERE "Recipients and nominees" = 'outstanding main title design'