what's the cover date where character(s) is x-men ; magneto
CREATE TABLE table_450 (
    "Character(s)" text,
    "First Appearance" text,
    "Cover Date" text,
    "Publisher" text,
    "Estimated Value" text
)
SELECT "Cover Date" FROM table_450 WHERE "Character(s)" = 'X-Men ; Magneto'
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: what's the cover date where character(s) is x-men ; magneto ### Input: CREATE TABLE table_450 (
    "Character(s)" text,
    "First Appearance" text,
    "Cover Date" text,
    "Publisher" text,
    "Estimated Value" text
) ### Response: SELECT "Cover Date" FROM table_450 WHERE "Character(s)" = 'X-Men ; Magneto'