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Speaking earlier to Microsoft programmers and reporters at a seminar in Stockholm , Sweden , Steven Ballmer , the company ' s chief executive , said , ` ` It is clear that hackers did see some of our source code , ' ' Reuters and The Associated Press reported .
 Stockholm , Sweden, Sweden, Microsoft, the company, our, Reuters, The Associated Press, Microsoft programmers, reporters, Steven Ballmer, the company ' s chief executive, hackers
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:
 Stockholm , Sweden, Sweden, Microsoft, the company, our, Reuters, The Associated Press, Microsoft programmers, reporters, Steven Ballmer, the company ' s chief executive, hackers