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International career Oblak was first called by the Slovenia under-21 team in August 2009 , replacing injured Jan Koprivec .
 Oblak, Slovenia under-21 team, Jan Koprivec
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Oblak, Slovenia under-21 team, Jan Koprivec