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Although Hermann Grassmann explained one of the anomalies with the publication of Grassmann 's law in 1862 , Karl Verner made a methodological breakthrough in 1875 , when he identified a pattern now known as Verner 's law , the first sound-law based on comparative evidence showing that a phonological change in one phoneme could depend on other factors within the same word ( such as neighbouring phonemes and the position of the accent ) , which is now called " conditioning environments " .
 person: Hermann Grassmann; person: Grassmann; person: Karl Verner; person: Verner
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: Hermann Grassmann, Grassmann, Karl Verner, Verner 
Answer:
 person: Hermann Grassmann; person: Grassmann; person: Karl Verner; person: Verner