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 stadium (capacity INTEGER, opening_year VARCHAR)
  ### Question:
  What is the average capacity of the stadiums that were opened in year 2005?
  ### Answer:
  SELECT AVG(capacity) FROM stadium WHERE opening_year = 2005