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The 1916 publication re-ignited interest in the flyaway islands , and explorer Sir Ernest Shackleton , when planning the Shackleton-Rowett Expedition of 1921-1922 , proclaimed as one of his goals the rediscovery of Tuanaki .
 Ernest Shackleton
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ernest Shackleton