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Lecture Natural language processing: Chapter 3 – Lê Ngọc Tấn

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Lecture “Natural language processing – Chapter 3: Basic principles for NLP” has contents: POS – part of speech tagging, POS – part of speech examples for English, POS – Methods of tagging, sentence types,…and other contents.
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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.comChapter 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 speechIt 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 EnglishNV ADJ ADVP 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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