Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE Visitors (Tourist_ID VARCHAR); CREATE TABLE Visits (Tourist_ID VARCHAR)
### Question:
How many tourists did not make any visit?
### Answer:
SELECT COUNT(*) FROM Visitors WHERE NOT Tourist_ID IN (SELECT Tourist_ID FROM Visits)