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edward lu and yuri malenchenko of russia will spend the next six months in the space station .
 russia, edward lu, yuri malenchenko of russia, the space station, space
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:
 russia, edward lu, yuri malenchenko of russia, the space station, space