508
His opposition to the Pakistan-United States backed  Afghan  jihad and support for Afghan communist President  Mohammad Najibullah  damaged his standing amongst many conservative Pashtuns and Pakistanis .
 origin: Afghan, Mohammad Najibullah
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:
 origin: Afghan, Mohammad Najibullah