what is the original channel when the note is co-star in year 2012?
CREATE TABLE table_57908 (
    "Year" real,
    "Title" text,
    "Original channel" text,
    "Role" text,
    "Note" text
)
SELECT "Original channel" FROM table_57908 WHERE "Note" = 'co-star' AND "Year" = '2012'
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 is the original channel when the note is co-star in year 2012? ### Input: CREATE TABLE table_57908 (
    "Year" real,
    "Title" text,
    "Original channel" text,
    "Role" text,
    "Note" text
) ### Response: SELECT "Original channel" FROM table_57908 WHERE "Note" = 'co-star' AND "Year" = '2012'