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_21821014_1 (installation_date VARCHAR, chapter VARCHAR)
  ### Question:
  What is the installation date for the Delta Chapter?
  ### Answer:
  SELECT installation_date FROM table_21821014_1 WHERE chapter = "Delta"