86481
In 1837 , however , Carl August von Steinheil of Munich , Germany , found that by connecting one leg of the apparatus at each station to metal plates buried in the ground , he could eliminate one wire and use a single wire for telegraphic communication .
 person: Carl August von Steinheil; location: Munich; location: Germany
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 August von Steinheil, Munich, Germany 
Answer:
 person: Carl August von Steinheil; location: Munich; location: Germany