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This argument was central , for example , to Adam Smith 's advocacy of letting a free market control production and price and allocate resources .
 person: Adam Smith
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: Adam Smith 
Answer:
 person: Adam Smith