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_16 (points INTEGER, year VARCHAR, entrant VARCHAR, chassis VARCHAR)
### Question:
What are the average points of Scuderia Scribante with a Brabham bt11 chassis before 1968?
### Answer:
SELECT AVG(points) FROM table_name_16 WHERE entrant = "scuderia scribante" AND chassis = "brabham bt11" AND year < 1968