48189
Therefore , they were not atoms , but a new particle , the first " subatomic " particle to be discovered , which he originally called " " corpuscle " " but was later named " electron " , after particles postulated by George Johnstone Stoney in 1874 .
 person: George Johnstone Stoney
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: George Johnstone Stoney 
Answer:
 person: George Johnstone Stoney