82743
Four members of the class were completed during the 1980 s and 1990 s , but due to budget constraints only the is operational with the Russian Navy , though plans were announced in 2010 to return the other three ships to service .
 Russian Navy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Russian Navy