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The Rooneys have provided fidelity , committing to Pittsburgh while Westinghouse , Rockwell International , Gulf Oil , Mesta Machine , J&L Steel and U.S. Steel reduced or ceased operations , said Rob Ruck , a history lecturer at the University of Pittsburgh who is co-writing a biography of Art Rooney .
 Gulf Oil, Pittsburgh; Pittsburgh, University of Pittsburgh; Art Rooney, Pittsburgh; Art Rooney, Pittsburgh
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:
 Gulf Oil, Pittsburgh; Pittsburgh, University of Pittsburgh; Art Rooney, Pittsburgh; Art Rooney, Pittsburgh