105113
First developed by Karl Marx and Friedrich Engels in the mid-19 th century , it has been the foremost ideology of the communist movement .
 person: Karl Marx; person: Friedrich Engels
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 
Answer:
 person: Karl Marx; person: Friedrich Engels