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The Greensand Ridge Walk is a long-distance walk of 40 miles ( 64 km ) that traverses the county of Bedfordshire in England , with brief sections in the neighbouring counties of Cambridgeshire and Buckinghamshire .
 location: Bedfordshire; location: England; location: Cambridgeshire; location: Buckinghamshire
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: Bedfordshire, England, Cambridgeshire, Buckinghamshire 
Answer:
 location: Bedfordshire; location: England; location: Cambridgeshire; location: Buckinghamshire