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Nomenclature and Stratigraphy The relationship to the term " Pottsville " and actual litholgic units is complex .
 location: Pottsville
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: Pottsville 
Answer:
 location: Pottsville