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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
Please list all entity words in the text that fit the category.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} 
Answer:
 person: Carl August von Steinheil; location: Munich; location: Germany