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 student (fname VARCHAR, city_code VARCHAR, age VARCHAR)
### Question:
Find the first name of students living in city PHL whose age is between 20 and 25.
### Answer:
SELECT fname FROM student WHERE city_code = 'PHL' AND age BETWEEN 20 AND 25