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A suggested name was " langevinium " , after Paul Langevin Later , the Dubna team mentioned the name " moscovium " several times as one among many possibilities , referring to the Moscow Oblast where Dubna is located .
 Paul Langevin, Dubna, Moscow Oblast, Dubna
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Paul Langevin, Dubna, Moscow Oblast, Dubna