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_74 (year INTEGER, engine VARCHAR)
### Question:
What year was the cosworth ca2006 2.4 v8 4 series used?
### Answer:
SELECT AVG(year) FROM table_name_74 WHERE engine = "cosworth ca2006 2.4 v8 4 series"