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The days when blue-collar work could be passed on down the family line , those days are over , '' said Gary N. Chaison , a professor of labor relations at Clark University in Worcester , Mass. '' Where you did have automobile plants , it was always looked at as an elite job .
 Worcester, Clark University
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 Worcester, Clark University