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: Find me information about PVC
Output: 



Output:
are you interested in a certain fitting for a pvc pipe
may i provide you medical definition of premature ventricular contractions
what aspect of pvc are you interested in the manufacturing or the applications
what project do you want to use the pvc for
what type of craft are you using the pvc for
would you like to know about premature ventricular contractions medical treatments
would you like to know what pvc is made of
would you like to learn more about pvc pipes and fittings
are you interested in a certain length of pvc pipe
are you interested in how pvc is made
are you interested in pvc pipe
are you interested in types of pvc pipe
are you looking for methods on how to repair leaks in pvc pipe
are you looking to buy pvc pipe
do you want to know how to make ballet bars out of pvc
is this in reference to plumbing or some other sort of plastic product