You are given a passage. Using the information present in the passage, you need to classify it into one of the 10 topics: 0 - 'Society & Culture', 1 - 'Science & Mathematics', 2 - 'Health', 3 - 'Education & Reference', 4 - 'Computers & Internet', 5 - 'Sports', 6 - 'Business & Finance', 7 - 'Entertainment & Music', 8 - 'Family & Relationships', 9 - 'Politics & Government'.

[EX Q]: The hot air weighs less then unheated air. The Air molecules move around faster. With the lighter air, the lanterns float up.. Causeing the garbage to float into someone elses yard
[EX A]: 0

[EX Q]: Probably not in the way that would be most satisfying for people like you and I. We live in a very frustrating time. We must keep reminding ourselves that is may take a hundred years, but historians will one day look back on this as a more than a mistake, but an actual act of terror perpetrated by the United States.

Future students will look back on it with the same kind of shame with which we view slavery.
[EX A]: 9

[EX Q]: Large companies usually have an HR person coordinating the interview for the hiring manager. In such a situation, its better to bring up the question with the HR person. After the first round of interviews, if you are being called back for further interviews, then I think this is a good time to bring it up with the recruiter.

If there is no recruiter involved, then in my opinion you should not bring up the compensation question till you get the sense that you are being seriously considered. The exception in my mind is that if you are trying to make some decisions/choices while interviewing for multiple positions then you can candidly bring it up after your first interview is done.
[EX A]:
6