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Structure of the model Diamond and Dybvig 's paper points out that business investment often requires expenditures in the present to obtain returns in the future ( for example , spending on machines and buildings now for production in future years ) .
 person: Diamond
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Diamond 
Answer:
 person: Diamond