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_2159547_3 (date_successor_seated VARCHAR, vacator VARCHAR)
  ### Question:
  On what date was James P. Buchanan (d)'s successor seated?
  ### Answer:
  SELECT date_successor_seated FROM table_2159547_3 WHERE vacator = "James P. Buchanan (D)"