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A special case of this general definition of a multiplicity is the order of vanishing of a non-zero algebraic function defined by a polynomial , then the order of vanishing of a rational function and and then is a Unit ( ring theory ) in the local ring .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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