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_39728 ( "Year" real, "Entrant" text, "Chassis" text, "Engine" text, "Points" real )

### Question ###
When is the latest year that an entrant has toro rosso str1 chassis and under 1 point?

### Accurate SQL ###

SELECT MAX("Year") FROM table_39728 WHERE "Chassis" = 'toro rosso str1' AND "Points" < '1'