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With Johann Arzberger ( 17781835 ) , he conducted research of public gas illumination , being credited with introducing a coal gas generating plant at the institute .
 person: Johann Arzberger
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: Johann Arzberger 
Answer:
 person: Johann Arzberger