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Intelligence sources say the correspondence came from the border between Pakistan and Afghanistan , where Osama bin Laden is believed to be hiding .
 Pakistan, Afghanistan, Osama bin Laden
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Pakistan, Afghanistan, Osama bin Laden