What date was Joakim Bonnier in the pole position?
CREATE TABLE table_name_21 (date VARCHAR, pole_position VARCHAR)
SELECT date FROM table_name_21 WHERE pole_position = "joakim bonnier"
### Context: CREATE TABLE table_name_21 (date VARCHAR, pole_position VARCHAR) ### Question: What date was Joakim Bonnier in the pole position? ### Answer: SELECT date FROM table_name_21 WHERE pole_position = "joakim bonnier"