5093
Pro- Russian forces open fire on Ukraine security service in Slavyansk , interior minister says http://t.co/kMaAkXL79U
 Russian, Ukraine, Slavyansk
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Russian, Ukraine, Slavyansk