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 bart sf
Output: 



Output:
are you interested in bart sf the company
do you need information on how to ride the bart
do you need to purchase a bart ticket
for what route are you seeking information
what information do you need about bart sf
are you looking for bart travel schedules
are you looking for a map of the bart system
are you looking for a specific web site
are you looking for contact info in relation to bart sf
are you looking for transit routes to berkeley from bart sf
are you looking for transit routes to oakland from bart sf
are you looking for transit routes to walnut creek from bart sf
are you taking the bart from san francisco international airport