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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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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None