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The 2013 IRB Tbilisi Cup is the inaugural edition of this international rugby union tournament , created by the International Rugby Board and will be played from 7 to 16 June 2013 .
 Tbilisi, International Rugby Board
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tbilisi, International Rugby Board