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History Radio Forest ( originally known as ' Forest Radio ' ) was established in November 1976 , the brainchild of local estate agent Heather Thirtle , providing music and entertainment to the patients and staff of the Forest Hospital in Buckhurst Hill , Essex .
 organization: Radio Forest; organization: Forest Radio; organization: Forest; location: Buckhurst Hill
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: Radio Forest, Forest Radio, Forest, Buckhurst Hill 
Answer:
 organization: Radio Forest; organization: Forest Radio; organization: Forest; location: Buckhurst Hill