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Lecture Natural language processing: Chapter 3 – Lê Ngọc Tấn
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Lecture Natural language processing: Chapter 3 – Lê Ngọc TấnTrường Đại học Công nghiệp Tp. HCMKhoa Công nghệ thông tin(Faculty of Information Technology)N.L.P.NATURAL LANGUAGE PROCESSINGTeacher: Lê Ngọc Tấn Email: letan.dhcn@gmail.com Blog: http://lengoctan.wordpress.comChapter 3Basic principles for NLPNLP. p.2POS – part of speech tagging (1)Perhaps starting with Aristotle in the West(384-322 BCE), there was the idea of havingparts of speechIt comes from Dionysius Thrax of Alexandria(c. 100 BCE), the idea that is still with us thatthere are 8 traditional parts of speech:– Thrax: noun, verb, article, adverb, preposition,conjunction, participle, pronoun– School grammar: noun, verb, adjective, adverb,preposition, conjunction, interjection, pronounNLP. p.3POS – part of speech examples for EnglishNV ADJ ADVP PRO DET CONJnounchair, bandwidth, pacingverbstudy, debate, munchadjpurple, tall, ridiculousadverbunfortunately, slowlyprepositionof, by, topronounI, me, minedeterminer the, a, that, thoseconjunctionand, orNLP. p.4Open vs. Closed Classes Openvs. Closed classes– Closed:••••determiners: a, an, thepronouns: she, he, Iprepositions: on, under, over, near, by, …Why “closed”?– Open:• Nouns, Verbs, Adjectives, Adverbs.NLP. p.5
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