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In 1996 the antimatter counterpart of the hydrogen atom ( antihydrogen ) was synthesized at the CERN laboratory in Geneva .
 location: CERN; location: Geneva
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: CERN, Geneva 
Answer:
 location: CERN; location: Geneva