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_79 (year INTEGER, entrant VARCHAR)
### Question:
How many years has Sasol Jordan Yamaha as an Entrant?
### Answer:
SELECT AVG(year) FROM table_name_79 WHERE entrant = "sasol jordan yamaha"