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Timeline of notable examples of progressive collapse Synonyms of progressive collapse and their origins Since the resulting damage in a progressive collapse is disproportionate to the original cause , the term disproportionate collapse is frequently used in engineering to describe this collapse type .
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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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