16523
Since the later discovery of the electron , an easier to remember , and more durably technically correct ( although historically false ) , etymology has been suggested : cathode , from the Greek " kathodos " , ' way down ' , ' the way ( down ) into the cell ( or other device ) for electrons ' .
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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:  
Answer:
 None