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.

Example Input: How many days does it take an embryo to implant?
Example Output: How many days does it most likely take for a human embryo to implant?

Example Input: When did the facebook messenger app come out?
Example Output: When was the facebook messenger app originally developed as Facebook Chat?

Example Input: When did the united nations ban chemical weapons?
Example Output:
When did the united nations ban chemical weapons by calling for all states to strictly observe the Geneva protocol?