86474
The first practical radio transmitters and receivers invented in 1894 – 1895 by Guglielmo Marconi used radiotelegraphy .
 person: Guglielmo Marconi
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: Guglielmo Marconi 
Answer:
 person: Guglielmo Marconi