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_1574968_1 (viewer VARCHAR, language VARCHAR)
  ### Question:
  Which viewers have the language of troff (typesetter runoff) , groff (gnu runoff)?
  ### Answer:
  SELECT viewer FROM table_1574968_1 WHERE language = "troff (typesetter runoff) , groff (GNU runoff)"