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_17 (entrant VARCHAR, points VARCHAR, chassis VARCHAR, year VARCHAR)
### Question:
What entrant had a Maserati 250F chassis and fewer than 6 points before 1957?
### Answer:
SELECT entrant FROM table_name_17 WHERE chassis = "maserati 250f" AND year < 1957 AND points < 6