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_1847180_3 (reason_for_change VARCHAR, vacator VARCHAR)
  ### Question:
  How many reasons were given when A. Willis Robertson (D) resigned?
  ### Answer:
  SELECT COUNT(reason_for_change) FROM table_1847180_3 WHERE vacator = "A. Willis Robertson (D)"