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 branch (open_year VARCHAR)
  ### Question:
  List all open years when at least two shops are opened.
  ### Answer:
  SELECT open_year FROM branch GROUP BY open_year HAVING COUNT(*) >= 2