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The Hamming distance is named after Richard Hamming , who introduced the concept in his fundamental paper on Hamming codes , " Error detecting and error correcting codes " , in 1950 .
 person: Richard Hamming
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: Richard Hamming 
Answer:
 person: Richard Hamming