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This book describes effective methods for automatically analyzing a sentence, based on the syntactic and semantic characteristics of the elements that form it. To tackle ambiguities, the authors use selectional preferences (SP), which measure how well two words fit together semantically in a sentence. Today, many disciplines require automatic text analysis based on the syntactic and semantic characteristics of language and as such several techniques for parsing sentences have been proposed. Which is better? In this book the authors begin with simple heuristics before moving on to more complex methods that identify nouns and verbs and then aggregate modifiers, and lastly discuss methods that can handle complex subordinate and relative clauses. During this process, several ambiguities arise. SP are commonly determined on the basis of the association between a pair of words. However, in many cases, SP depend on more words. For example, something (such as grass) may be edible, depending on who is eating it (a cow?). Moreover, things such as popcorn are usually eaten at the movies, and not in a restaurant. The authors deal with these phenomena from different points of view.
A description is given of PARSE, a system for the automatic syntactic analysis of English sentences. It is capable of analyzing and labeling the structure of a variety of sentences. The system employs a parsing logic which both applies the grammar exhaustively and disengages it from the routines that apply it to text, so that changes in grammar will not affect the program. The memorandum describes the linguistic features and details the operation of the program. (Author).
A list is presented of the three major components of PARSE, a system for the automatic syntactic analysis of English sentences. It contains: (1) a glossary of the words used, grouped alphabetically by families; (2) a presentation of the words organized by the grammar codes devised for them; and (3) a listing of 26 words which, because of their excessive length, would not fit the format and had to be removed from the main body of the glossary. A final section lists errata. (Author).