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THE joint winners of the NLNG 2007 prize for literature Mrs. Mabel Segun and professor Akachi Ezeigbo will be among delegates attending the African Literature Association Conference holding ( ALA 2008 ) at the  Western Illinois University  USA in  Macomb  IL .
 city of headquarters: Western Illinois University, Macomb
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:
 city of headquarters: Western Illinois University, Macomb