Conclusion
1. Linoff and Berry (2002).
2. Wasserman and Faust (2009).
3. Feldman and Sanger (2006).
4. Antoniou and Harmelen (2008).
5. http://www.cyc.com/
6. Han and Kamber (2006).
7. http://www.turing.org.uk/turing/scrapbook/test.html.
8. Russel and Norvig (2009).
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