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_20 (class VARCHAR, stages_won VARCHAR, position VARCHAR)
### Question:
What is the class that that won 2 stages and has a position of DNF?
### Answer:
SELECT class FROM table_name_20 WHERE stages_won = "2" AND position = "dnf"