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Lecture Natural language processing: Chapter 3 – Lê Ngọc Tấn

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. | Trường Đại học Công nghiệp Tp. HCM Khoa Công nghệ thông tin (Faculty of Information Technology) N.L.P. NATURAL LANGUAGE PROCESSING Teacher: Lê Ngọc Tấn Email: letan.dhcn@gmail.com Blog: http://lengoctan.wordpress.com Chapter 3 Basic principles for NLP NLP. p.2 POS – part of speech tagging (1) Perhaps starting with Aristotle in the West (384-322 BCE), there was the idea of having parts of speech It comes from Dionysius Thrax of Alexandria (c. 100 BCE), the idea that is still with us that there are 8 traditional parts of speech: – Thrax: noun, verb, article, adverb, preposition, conjunction, participle, pronoun – School grammar: noun, verb, adjective, adverb, preposition, conjunction, interjection, pronoun NLP. p.3 POS – part of speech examples for English N V ADJ ADV P PRO DET CONJ noun chair, bandwidth, pacing verb study, debate, munch adj purple, tall, ridiculous adverb unfortunately, slowly preposition of, by, to pronoun I, me, mine determiner the, a, that, those conjunction and, or NLP. p.4 Open vs. Closed Classes Open vs. Closed classes – Closed: • • • • determiners: a, an, the pronouns: she, he, I prepositions: on, under, over, near, by, Why “closed”? – Open: • Nouns, Verbs, Adjectives, Adverbs. NLP. .