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Comment: 4 Pages, Invited Paper in VCON'10: 2nd Vaagdevi International
Conference on Information Technology for Real World Problems Vaagdevi College
of Engineering, Warangal, Andhra Pradesh, India, December 9-11, 2010.
Z. Yin, M. Gupta, T. Weninger, and J. Han. Proceedings of the 19th International Conference on World Wide Web (WWW 2010), page 1211--1212. New York, NY, USA, ACM, (2010)