Handbook of Natural Language Processing by Dale, Robert

By Dale, Robert

This examine explores the layout and alertness of normal language text-based processing structures, in keeping with generative linguistics, empirical copus research, and synthetic neural networks. It emphasizes the sensible instruments to house the chosen method

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Handbook of Natural Language Processing

This research explores the layout and alertness of typical language text-based processing platforms, in keeping with generative linguistics, empirical copus research, and synthetic neural networks. It emphasizes the sensible instruments to deal with the chosen method

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The apostrophe is a very ambiguous character. In English, the main uses of apostrophes are to mark the genitive form of a noun, to mark contractions, and to mark certain plural forms. In the genitive case, some applications require a separate token while some require a single token, as discussed in Sec. C. How to treat the genitive case is important, as in other languages, the possessive form of a word is not marked with an apostrophe and cannot be as readily recognized. In German, for example, the possessive form of a noun is usually formed by adding the letter s to the word, without an apostrophe, as in Peters Kopf (Peter's head).

However, as Saint it is less likely to occur at a sentence boundary than Street or State. Examples {4} and {5} from the Wall Street Journal (1991 and 1987, respectively) demonstrate the dif®culties produced by such ambiguous cases, where the same abbreviation can represent different words and can occur both within and at the end of a sentence. The contemporary viewer may simply ogle the vast wooded vistas rising up from the Saguenay River and Lac St. Jean, standing in for the St. Lawrence River.

Tokenisation and Sentence Segmentation 25 algorithm with a ``perfect'' word list containing all known English words would ®rst identify the word theta, since that is the longest sequence of letters starting at the initial t which forms an actual word. Starting at the b following theta, the algorithm would then identify bled as the maximum match. Continuing in this manner, thetabledownthere would be segmented by the greedy algorithm as theta bled own there. A variant of the maximum matching algorithm is the reverse maximum matching algorithm, in which the matching proceeds from the end of the string of characters, rather than the beginning.

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