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In 1898 , Fritz Haber showed that definite reduction products can result from electrolytic processes if the potential at the cathode is kept constant .
 person: Fritz Haber
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: Fritz Haber 
Answer:
 person: Fritz Haber