21331
The storm formed from an area of cumulonimbus clouds along a disturbance associated with the Intertropical Convergence Zone ( ITCZ ) on August 12 , but advisories were not issued until August 13 , when it was named at peak intensity .
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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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