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Initially Howland was a follower of Thomas Cartwright , and signed the unsuccessful petition to Lord Burghley in 1571 asking that Cartwright might be allowed to return to Cambridge .
 Howland, Thomas Cartwright, Lord Burghley, Cartwright, Cambridge
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Howland, Thomas Cartwright, Lord Burghley, Cartwright, Cambridge