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The plant , based on Russian design and upgraded with U . S . technology , has been plagued by frequent , non - nuclear malfunctions since testing began in November 2000 .
 Russian, U . S, The plant , based on Russian design and upgraded with U . S . technology
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 Russian, U . S, The plant , based on Russian design and upgraded with U . S . technology