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In December 1940 , Glenn T. Seaborg and Emilio Segrè used the cyclotron to bombard uranium-238 with deuterons producing a new element , neptunium-238 , which decayed by beta emission to form plutonium-238 .
 person: Glenn T. Seaborg; person: Emilio Segrè
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: Glenn T. Seaborg; person: Emilio Segrè