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The mathematical work of James Clerk Maxwell during the 1850 s had shown the relationship of different forms of electromagnetic radiation including the possibility of invisible airborne waves ( later called " radio waves " ) .
 person: James Clerk Maxwell
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: James Clerk Maxwell 
Answer:
 person: James Clerk Maxwell