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According to Tibor Machan , " [ w ] ithout a market in which allocations can be made in obedience to the law of supply and demand , it is difficult or impossible to funnel resources with respect to actual human preferences and goals " .
 person: Tibor Machan
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: Tibor Machan 
Answer:
 person: Tibor Machan