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In tapping into the world's email telephone and fax traffic and data bases the NSA relies on a network of spy satellites overseen by the  National Reconnaissance Office  based in  Chantilly  Virginia .
 National Reconnaissance Office, Chantilly
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 National Reconnaissance Office, Chantilly