12131
Currently , this portion of the theory consists of Kronecker-Weber theorem , which can be used to construct the abelian extensions of and the theory of complex multiplication , which can be used to construct the abelian extensions of CM-fields .
 person: Kronecker-Weber
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: Kronecker-Weber 
Answer:
 person: Kronecker-Weber