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The CGS unit of magnetic induction ( oersted ) is named in honor of his contributions to the field of electromagnetism .
 location: CGS
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: CGS 
Answer:
 location: CGS