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Marion Brooks Natural Area , known for its large stand of White Birch , was formerly known as Paige Run Natural Area ; in 1975 it was renamed for Marion E. Brooks , a pioneering environmentalist from Elk County .
 location: Elk
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: Elk 
Answer:
 location: Elk