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Even Washington's long-time nemesis -- the hard-core Marxist and former Soviet ally former president  Mohammad Najibullah  of  Afghanistan  against whom the United States helped sponsor Pakistani-directed guerrilla warfare -- a few days before his ouster from power offered his services in the new struggle against the radical Islamic threat .
 countries of residence: Mohammad Najibullah, Afghanistan
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: 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:
 countries of residence: Mohammad Najibullah, Afghanistan