Tagging and word-sense disambiguation

The second type of algorithm performs word sense disambiguation (WSD). The difference between this and tagging is that in word sense disambiguation, we define multiple sets of labels Li,L2.Lm and choose a label from one of these sets for only some of the tokens. In natural language processing, WSD is often used for semantic disambiguation to resolve cases such as  

Chapter 5. Text Decoding Finding the words from the text 

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