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The ten largest recorded earthquakes have all been megathrust earthquakes ; however , of these ten , only the 2004 Indian Ocean earthquake is simultaneously one of the deadliest earthquakes in history .
 2004 Indian Ocean earthquake
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 2004 Indian Ocean earthquake