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_97 (year_joined INTEGER, enrollment VARCHAR, school VARCHAR)
### Question:
Which Year Joined has an Enrollment smaller than 726, and a School of tri-west?
### Answer:
SELECT MAX(year_joined) FROM table_name_97 WHERE enrollment < 726 AND school = "tri-west"