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_33 (year INTEGER, chassis VARCHAR)
### Question:
What's the top year with the Chassis ats hs1?
### Answer:
SELECT MAX(year) FROM table_name_33 WHERE chassis = "ats hs1"