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_2160008_4 (reason_for_change VARCHAR, date_successor_seated VARCHAR)
  ### Question:
  Name the number of reason for change on may 11, 1939
  ### Answer:
  SELECT COUNT(reason_for_change) FROM table_2160008_4 WHERE date_successor_seated = "May 11, 1939"