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Lexical Semantics & Word Sense Disambiguation CMSC 35100 Natural Language Processing May 15, 2003
Roadmap ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Word-internal Structure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Selectional Restrictions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Primitive Decompositions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Word Sense Disambiguation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Selectional Restriction Approaches ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Selectional Restrictions: Limitations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Robust Disambiguation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Disambiguation Features ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Naïve Bayes’ Approach ,[object Object],[object Object],[object Object],[object Object]
Example: “Plant” Disambiguation There are more kinds of plants and animals in the rainforests than anywhere else on Earth. Over half of the millions of known species of plants and animals live in the rainforest. Many are found nowhere else. There are even plants and animals in the rainforest that we have not yet discovered. Biological Example The Paulus company was founded in 1938. Since those days the product range has been the subject of constant expansions and is brought up continuously to correspond with the state of the art. We’re engineering, manufacturing and commissioning world- wide ready-to-run plants packed with our comprehensive know-how. Our Product Range includes pneumatic conveying systems for carbon, carbide, sand, lime and many others. We use reagent injection in molten metal for the… Industrial Example Label the First Use of “Plant”
Yarowsky’s Decision Lists: Detail ,[object Object],[object Object],[object Object],Same Sense
Yarowsky’s Decision Lists: Detail ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Sense Choice With Collocational Decision Lists ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Semantic Ambiguity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Schutze’s Vector Space: Detail ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],97 Real Values
Schutze’s Vector Space: continued ,[object Object],[object Object],[object Object],[object Object],[object Object]
Sense Selection in “Word Space” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Resnik’s WordNet Labeling: Detail ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Sense Labeling Under WordNet ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Question of Context ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Sense
Taxonomy of Contextual Information ,[object Object],[object Object],[object Object],[object Object],[object Object]
A Trivial Definition of Context All Words within X words of Target ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Limits of Wide Context ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Surface Regularities = Useful Disambiguators ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Interactions Below the Surface ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is Similar ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Class14

  • 1. Lexical Semantics & Word Sense Disambiguation CMSC 35100 Natural Language Processing May 15, 2003
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  • 12. Example: “Plant” Disambiguation There are more kinds of plants and animals in the rainforests than anywhere else on Earth. Over half of the millions of known species of plants and animals live in the rainforest. Many are found nowhere else. There are even plants and animals in the rainforest that we have not yet discovered. Biological Example The Paulus company was founded in 1938. Since those days the product range has been the subject of constant expansions and is brought up continuously to correspond with the state of the art. We’re engineering, manufacturing and commissioning world- wide ready-to-run plants packed with our comprehensive know-how. Our Product Range includes pneumatic conveying systems for carbon, carbide, sand, lime and many others. We use reagent injection in molten metal for the… Industrial Example Label the First Use of “Plant”
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