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_2417345_4 (reason_for_change VARCHAR, vacator VARCHAR)
### Question:
Name the reason for change when George W. Greene (D) was the vacator.
### Answer:
SELECT reason_for_change FROM table_2417345_4 WHERE vacator = "George W. Greene (D)"