http://gigazine.net/news/20130603-analyse-pesonality-on-twitter/

http://www.asahi.com/politics/update/0604/TKY201306040098.html

http://sankei.jp.msn.com/affairs/news/130604/trl13060416410000-n1.htm

http://www.yomiuri.co.jp/editorial/news/20130603-OYT1T01507.htm?from=ylist

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