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In 1867 , tsar Alexander II of Russia issued the Ems Ukaz , a secret decree banning the use of the Ukrainian language in print , with the exception of reprinting of old documents .
 Alexander II of Russia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alexander II of Russia