On what date was Motherwell the opponent at Fir Park?
CREATE TABLE table_name_77 (
    date VARCHAR,
    opponent VARCHAR,
    venue VARCHAR
)
SELECT date FROM table_name_77 WHERE opponent = "motherwell" AND venue = "fir park"
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: On what date was Motherwell the opponent at Fir Park? ### Input: CREATE TABLE table_name_77 (
    date VARCHAR,
    opponent VARCHAR,
    venue VARCHAR
) ### Response: SELECT date FROM table_name_77 WHERE opponent = "motherwell" AND venue = "fir park"