text: 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_11 (week INTEGER, game_site VARCHAR, date VARCHAR)
  ### Question:
  What average week has shea stadium as the game site, and 1979-12-09 as the date?
  ### Answer:
  SELECT AVG(week) FROM table_name_11 WHERE game_site = "shea stadium" AND date = "1979-12-09"