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_25695027_1 (years_built VARCHAR, cylinder_size VARCHAR, firebox VARCHAR)
  ### Question:
  This engine with a cylinder size of 20 ½” x 26” and a firebox of radial-stay was built when?
  ### Answer:
  SELECT years_built FROM table_25695027_1 WHERE cylinder_size = "20 ½” x 26”" AND firebox = "Radial-stay"