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 table_name_5 (class VARCHAR, pos VARCHAR, laps VARCHAR)
### Question:
In which class had 252 laps and a position of dnf?
### Answer:
SELECT class FROM table_name_5 WHERE pos = "dnf" AND laps = 252