8619
Then he and his supporters accused the government of rigging the election and claimed victory ; beginning on 20 February he led continuous protests involving tens of thousands of his supporters in Yerevan .
 location: Yerevan
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Yerevan