235047
On November 29 , 2011 , Russian Ambassador to Qatar , Vladimir Titorenko , was allegedly assaulted by Qatar airport security and customs officers when he refused to have his valise scanned at the airport .
 Qatar, Vladimir Titorenko, Qatar
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Qatar, Vladimir Titorenko, Qatar