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The 1951 East Rift Valley earthquakes ( ) were a series of 735 earthquakes which struck eastern Taiwan from October 22 , 1951 to December 5 , 1951 , four of which registered over 7 on the Richter Scale , the largest of those being two magnitude 7.3 quakes on October 22 and November 25 .
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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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