Definition: Sometimes users of dialogue systems ask vague questions/queries from the system. In this case, the system asks them a clarifying question to be able to answer it correctly. In this task, you are given a question/query in natural language and your task is to ask a good clarifying question to understand the given question/query more precisely.

Positive Example 1 -
Input: Tell me about defender
Output: are you referring to the arcade game called defender

Positive Example 2 -
Input: I'm looking for information on hobby stores
Output: what location do you want to find a hobby store in

Negative Example 1 -
Input: Find me information about the Ritz Carlton Lake Las Vegas.
Output: do you want information about Ritz Carlton Lake now or later

Negative Example 2 -
Input: I'm looking for information on hobby stores
Output: why are you looking for information on stores

Now complete the following example -
Input: Tell me about source of the nile
Output: 



Output:
are you interested in the origin of the nile
which nile are you interested in learning about
which part of the river are you more interested in
would you like to know what the nile is composed of
are you referring to the nile river
do you want a history of the nile
do you want a map
do you want to know about the source of the video game
do you want to know the name of the source
do you want to know what country the source is in
do you want to know where the nile is located
is there any specific information about the river that would interest you