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_28744929_1 (joined_acc VARCHAR, location VARCHAR)
  ### Question:
  when did the institution at chapel hill, North carolina join acc?
  ### Answer:
  SELECT joined_acc FROM table_28744929_1 WHERE location = "Chapel Hill, North Carolina"