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The term " neutronium " was coined in 1926 by Andreas von Antropoff for a conjectured form of matter made up of neutrons with no protons or electrons , which he placed as the chemical element of atomic number zero at the head of his new version of the periodic table .
 person: Andreas von Antropoff
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: Andreas von Antropoff 
Answer:
 person: Andreas von Antropoff