20442
Cyprus and Malta in 2008 , Slovakia in 2009 , Estonia in 2011 , Latvia in 2014 and Lithuania joined on 1 January 2015 .
 Cyprus, Malta, Slovakia, Estonia, Latvia, Lithuania
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Cyprus, Malta, Slovakia, Estonia, Latvia, Lithuania