4822
Over two decades in existence the University has come a long way in addressing some of the engineering agricultural scientific environmental and technological challenges common to third world nations like  Nigeria  having been adjudged the fifth best  University  with one of the best engineering programmes in Nigeria .
 country of headquarters: Nigeria, University
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:
 country of headquarters: Nigeria, University