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 airports (city VARCHAR, country VARCHAR)
### Question:
Return the cities with more than 3 airports in the United States.
### Answer:
SELECT city FROM airports WHERE country = 'United States' GROUP BY city HAVING COUNT(*) > 3