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Date: 2009-12-07 01:07:10Carnegie Mellon University Crowdsourcing Human-based computation ReCAPTCHA Quotation mark Orthography ESP game Apostrophe Computing Punctuation World Wide Web Anti-spam | Microsoft Word - hw4_sampleanswer.docAdd to Reading ListSource URL: www.cse.cuhk.edu.hkDownload Document from Source WebsiteFile Size: 35,33 KBShare Document on Facebook |