What date was Joakim Bonnier in the pole position?
CREATE TABLE table_53106 (
    "Race" text,
    "Circuit" text,
    "Date" text,
    "Pole position" text,
    "Fastest lap" text,
    "Winning driver" text,
    "Constructor" text,
    "Tyre" text,
    "Report" text
)
SELECT "Date" FROM table_53106 WHERE "Pole position" = 'joakim bonnier'
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 date was Joakim Bonnier in the pole position? ### Input: CREATE TABLE table_53106 (
    "Race" text,
    "Circuit" text,
    "Date" text,
    "Pole position" text,
    "Fastest lap" text,
    "Winning driver" text,
    "Constructor" text,
    "Tyre" text,
    "Report" text
) ### Response: SELECT "Date" FROM table_53106 WHERE "Pole position" = 'joakim bonnier'