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_85 (year VARCHAR, chassis VARCHAR, points VARCHAR)
### Question:
Name the total number of years for chassis of maserati 250f and points less than 0
### Answer:
SELECT COUNT(year) FROM table_name_85 WHERE chassis = "maserati 250f" AND points < 0