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Socialist thinkers such as Karl Marx , Friedrich Engels , and Vladimir Lenin argue that economic class , rather than nationality , race , or culture , is the main force which divides people in society , and that nationalist ideology is a propaganda tool of a society 's dominant economic class .
 person: Karl Marx; person: Friedrich Engels; person: Vladimir Lenin
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: Karl Marx, Friedrich Engels, Vladimir Lenin 
Answer:
 person: Karl Marx; person: Friedrich Engels; person: Vladimir Lenin