6865
''Fredonia '' , built in 1845 at Newburyport , Massachusetts , was purchased at Boston , Massachusetts , 14 December 1846 for $ 52,000 .
 Newburyport , Massachusetts, Boston, Massachusetts
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Newburyport , Massachusetts, Boston, Massachusetts