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_8 (sites INTEGER, screens VARCHAR, rank VARCHAR)
  ### Question:
  what is the number of sites when the number of screens is 687 and rank is more than 7?
  ### Answer:
  SELECT AVG(sites) FROM table_name_8 WHERE screens = 687 AND rank > 7