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During the approximate period of the 1880 s to about 1920 , sometimes called " the eclipse of Darwinism " , scientists proposed various alternative evolutionary mechanisms which eventually proved untenable .
 person: Darwinism
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: Darwinism