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Some time before 28 June 1943 the post office was moved to the west side of Gilford Island ( likely at the seaplane base 50º45 ' 35 " - 126º29 ' 10 " outside Echo Bay ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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