In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to write a question that clarifies the given question in such a way that the generated question has one unique answer.
--------
Question: Where do you find the black widow spider?

Answer: In which climates do you find the black widow spider?


Question: When was the wreck of the titanic found?

Answer: On what date was the wreck of the Titanic found?


Question: When was the last time celtics won nba championship?

Answer:
As of 2017, when was the last time the Celtics won the NBA championship?