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Economists such as Joseph Stiglitz , Mancur Olson and others not specifically advancing anti-socialists positions have shown that prevailing economic models upon which democratic or market socialism might be based have logical flaws or unworkable presuppositions .
 person: Joseph Stiglitz; person: Mancur Olson
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Joseph Stiglitz, Mancur Olson 
Answer:
 person: Joseph Stiglitz; person: Mancur Olson