64831
For the density of the observable universe of about 4.6 × 10 " kg / m and given the known abundance of the chemical elements , the corresponding maximal radiation energy density of 9.2 × 10 kg / m , i.e. temperature 3.2 " K ( matching the value observed for the optical radiation temperature by Arthur Eddington ) .
 person: Arthur Eddington
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: Arthur Eddington 
Answer:
 person: Arthur Eddington