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John T. Koch of Aberystwyth University suggested that Tartessian inscriptions of the 8th century BC might be classified as Celtic .
 person: John T. Koch; organization: Aberystwyth University
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: John T. Koch, Aberystwyth University 
Answer:
 person: John T. Koch; organization: Aberystwyth University