25169
In the case of a charged ( Reissner–Nordström ) or rotating ( Kerr ) black hole , it is possible to avoid the singularity .
 person: Reissner–Nordström; person: Kerr
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: Reissner–Nordström, Kerr 
Answer:
 person: Reissner–Nordström; person: Kerr