6359
Background In 1570 and 1571 , Ivan IV " the Terrible " of Russia faced internal disputes , culminating in the slaughter of Novgorod 's inhabitants and the burning of Moscow by the tartars .
 Ivan IV " the Terrible " of Russia, Novgorod, Moscow
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ivan IV " the Terrible " of Russia, Novgorod, Moscow