What is the mail date of the document with id 7?
CREATE TABLE Documents_Mailed (
    mailing_date VARCHAR,
    document_id VARCHAR
)
SELECT mailing_date FROM Documents_Mailed WHERE document_id = 7
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 mail date of the document with id 7? ### Input: CREATE TABLE Documents_Mailed (
    mailing_date VARCHAR,
    document_id VARCHAR
) ### Response: SELECT mailing_date FROM Documents_Mailed WHERE document_id = 7