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Whittlesea Mere was an area of open water in the Fenland area of the county of Huntingdonshire ( now Cambridgeshire ) , England .
 Huntingdonshire, Cambridgeshire, England
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Huntingdonshire, Cambridgeshire, England