instruction:
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:
When did the movie knock knock come out?
answer:
When did the short animated film knock knock come out featuring Woody Woodpecker?


question:
Who developed a method of printing that greatly stimulated the growth of literacy?
answer:
Who developed a method of printing called the printing press that greatly stimulated the growth of literacy?


question:
What is the second series of percy jackson called?
answer:

What is the second in the book series of percy jackson called?