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The definition employed by Michael van Notten ( based upon one by Frank van Dun ) is not , strictly , that of rule by judges , judges not being a formal political class but rather people selected at random to perform that task ad hoc ; but rather is that of a legal and political system whose closest analogue in other societies is that of a system based entirely upon customary rather than statutory law .
 person: Michael van Notten; person: Frank van Dun
Please list all entity words in the text that fit the category.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} 
Answer:
 person: Michael van Notten; person: Frank van Dun