What year(s) was Duisburg runner-up?
CREATE TABLE table_64747 (
    "Team" text,
    "Winners" real,
    "Runners-up" real,
    "Years won" text,
    "Years runner-up" text
)
SELECT "Years runner-up" FROM table_64747 WHERE "Team" = 'duisburg'
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 year(s) was Duisburg runner-up? ### Input: CREATE TABLE table_64747 (
    "Team" text,
    "Winners" real,
    "Runners-up" real,
    "Years won" text,
    "Years runner-up" text
) ### Response: SELECT "Years runner-up" FROM table_64747 WHERE "Team" = 'duisburg'