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Alexander Mikhajlovich Baldin ( Russian : Александр Михайлович Балдин ) ( February 26 , 1926 , Moscow — April 29 , 2001 ) was a Russian Soviet physicist , expert in the field of physics of elementary particles and high energy physics .
 Alexander Mikhajlovich Baldin, Moscow
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 Alexander Mikhajlovich Baldin, Moscow