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The commission also contacted electrical experts , including Thomson-Houston Electric Company 's Elihu Thomson ( who recommended high voltage AC connected to the head and the spine ) and the inventor Thomas Edison ( who also recommended AC , as well as using a Westinghouse generator ) .
 organization: Thomson-Houston Electric Company; person: Elihu Thomson; person: Thomas Edison; organization: Westinghouse
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: Thomson-Houston Electric Company, Elihu Thomson, Thomas Edison, Westinghouse 
Answer:
 organization: Thomson-Houston Electric Company; person: Elihu Thomson; person: Thomas Edison; organization: Westinghouse