Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_13445 ( "School" text, "Location" text, "Mascot" text, "Enrollment" real, "IHSAA Class" text, "County" text, "Year Joined" real )

### Question ###
Which Year Joined has an Enrollment smaller than 726, and a School of tri-west?

### Accurate SQL ###

SELECT MAX("Year Joined") FROM table_13445 WHERE "Enrollment" < '726' AND "School" = 'tri-west'