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Keith D. Ewing is Professor of Public Law at King 's College London and co-author of two of Britain 's leading textbooks in constitutional and administrative law , and labour law .
 person: Keith; person: Ewing; organization: King 's College London
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: Keith, Ewing, King 's College London 
Answer:
 person: Keith; person: Ewing; organization: King 's College London