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_93 (points INTEGER, engine VARCHAR, chassis VARCHAR)
### Question:
What is the average number of points for an Offenhauser L4 engine with a Trevis chassis?
### Answer:
SELECT AVG(points) FROM table_name_93 WHERE engine = "offenhauser l4" AND chassis = "trevis"