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Jun 21, 2013 at 20:08 vote accept Hao Chen
Jun 21, 2013 at 18:55 answer added Jim Humphreys timeline score: 5
Jun 21, 2013 at 14:10 history edited Hao Chen
edited tags
Jun 21, 2013 at 13:52 history edited Hao Chen CC BY-SA 3.0
added 54 characters in body
Jun 21, 2013 at 13:46 history asked Hao Chen CC BY-SA 3.0