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It was the Chicago public school system that most fully embraced the concept , and when Paul Vallas , the former chief executive officer for Chicago 's schools , moved to head Philadelphia 's public school system three years ago , he brought his enthusiasm for the military model . ''
 place of birth: Paul Vallas, Chicago; place of birth: Paul Vallas, Chicago
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: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 place of birth: Paul Vallas, Chicago; place of birth: Paul Vallas, Chicago