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 CARS_DATA (mpg INTEGER, Cylinders VARCHAR)
### Question:
What is the average miles per gallon(mpg) of the cars with 4 cylinders?
### Answer:
SELECT AVG(mpg) FROM CARS_DATA WHERE Cylinders = 4