92188
It was used for the first time in this way in 1872 by Lord Rayleigh , who was trying to understand why the sky is blue .
 person: Rayleigh
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: Rayleigh 
Answer:
 person: Rayleigh