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'.
Q: Well, search engines like Yahoo! and Google try to be something like that but, of course, they can only be approximate. There are a number of problems with indexing EVERYTHING on the web:

a) It changes every second! No index or table of contents could keep up.

b) It is de-centralized. New web pages do not have to pass through any central controlling authority. How would an indexer/table-of-contents-compiler know what to add? The best that the search engines can do is something called "crawling" the web, looking for new pages.

c) Some people don't WANT the rest of the world to know about their web pages. They just want a few people -- maybe just friends and family -- to be able to find the pages easily.
A:
6