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_name_5 (ceased_to_be_duchess VARCHAR, became_duchess VARCHAR)
### Question:
When did the duchess who became duchess on 7/8 April 1766 cease to be duchess?
### Answer:
SELECT ceased_to_be_duchess FROM table_name_5 WHERE became_duchess = "7/8 april 1766"