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This strike may be of historic importance , '' said Gary Chaison , a professor of industrial relations at Clark University in Worcester , Mass. '' Here members of a labor union are on strike to save their jobs , and the rest of the labor movement refuses to help it .
 Worcester, Clark University; Gary Chaison, Clark University; Gary Chaison, Worcester
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; Gary Chaison, Clark University; Gary Chaison, Worcester