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The problem arose after Palestinian Mahmood Abu Talib , whose testimony the court has been hearing since Friday , refused to continue answering a question by defense lawyer Richard Keen about the detailed reasons for his having lived in the former Soviet Union for a period of 18 months in the 70s .
 Palestinian, the former Soviet Union, the court, Palestinian Mahmood Abu Talib , whose testimony the court has been hearing since Friday, whose, defense lawyer, defense lawyer Richard Keen, his
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 Palestinian, the former Soviet Union, the court, Palestinian Mahmood Abu Talib , whose testimony the court has been hearing since Friday, whose, defense lawyer, defense lawyer Richard Keen, his