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The London Green Fair ( previously known as the Camden Green Fair and Bikefest ) is held on the first Sunday in June from 12noon - 7pm , at Regent 's Park in London , England , coinciding with World Environment Day .
 location: Camden; location: London , England
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: Camden, London , England 
Answer:
 location: Camden; location: London , England