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_28 (year INTEGER, competition VARCHAR, club VARCHAR)
### Question:
What is the average Year when the Competition was friendly, and a Club of everton?
### Answer:
SELECT AVG(year) FROM table_name_28 WHERE competition = "friendly" AND club = "everton"