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_3 (class VARCHAR, length VARCHAR, circuit VARCHAR)
### Question:
Which class was on the Las Vegas Motor Speedway for 2 hours?
### Answer:
SELECT class FROM table_name_3 WHERE length = "2 hours" AND circuit = "las vegas motor speedway"