158667
After Demjanjuk was convicted in a Munich criminal court May , 2011 , the Operation Last Chance team of investigators , attorneys , and German prosecutors began to focus on another Ukrainian national , a Nazi collaborator who had also illegally sought and obtained refuge in the United States , John Kalymon .
 Demjanjuk
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Demjanjuk