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In the early 20th century , Carl von Voit and Max Rubner independently measured caloric energy expenditure in different species of animals , applying principles of physics in nutrition .
 person: Carl von Voit; person: Max Rubner
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: Carl von Voit, Max Rubner 
Answer:
 person: Carl von Voit; person: Max Rubner