What was the date for the pole position of alain prost?
CREATE TABLE table_1140067_2 (
    date VARCHAR,
    pole_position VARCHAR
)
SELECT date FROM table_1140067_2 WHERE pole_position = "Alain Prost"
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 was the date for the pole position of alain prost? ### Input: CREATE TABLE table_1140067_2 (
    date VARCHAR,
    pole_position VARCHAR
) ### Response: SELECT date FROM table_1140067_2 WHERE pole_position = "Alain Prost"