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a month later , u . s . and pakistani force hs a lead on osama bin laden , but by the time they moved in , he had vanished again .
 u . s, pakistani, u . s . and pakistani force, osama bin laden, they, he
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 u . s, pakistani, u . s . and pakistani force, osama bin laden, they, he