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