12533
If Prout 's hypothesis were true , something had to be neutralizing some of the charge of the hydrogen nuclei present in the nuclei of heavier atoms .
 person: Prout
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: Prout 
Answer:
 person: Prout