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Throughout the season the United States Navy also monitored the basin and issued unofficial warnings , through its Joint Typhoon Warning Center ( JTWC ) and Naval Pacific Meteorology and Oceanography Center ( NPMOC ) .
 Joint Typhoon Warning Center
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Joint Typhoon Warning Center