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Whilst he tended to ignore previous work and his own work on classification was of poor quality , Motschulsky made a massive contribution to entomology , exploring hitherto unworked regions , often in very difficult terrain .
 person: Motschulsky
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Motschulsky