What is the date of Competition of 2008 africa cup of nations?
CREATE TABLE table_58447 (
    "Date" text,
    "Venue" text,
    "Score" text,
    "Result" text,
    "Competition" text
)
SELECT "Date" FROM table_58447 WHERE "Competition" = '2008 africa cup of nations'
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 is the date of Competition of 2008 africa cup of nations? ### Input: CREATE TABLE table_58447 (
    "Date" text,
    "Venue" text,
    "Score" text,
    "Result" text,
    "Competition" text
) ### Response: SELECT "Date" FROM table_58447 WHERE "Competition" = '2008 africa cup of nations'