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Kuroyedov added that the " possibility of completing the rescue operation successfully is very much dependent on the situation inside the submarine " and said that the crew remaining alive depended on a series of factors .
 Kuroyedov, the crew, the submarine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 Kuroyedov, the crew, the submarine