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The American Theatre Organ Society restored the organ in 1970 , which had expanded the organ from 26 to 29 ranks by that time .
 organization: American Theatre Organ Society
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: American Theatre Organ Society