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But if there was foul play in his death , it may have had more to do with internal power struggles than with the United Nations investigation , said Joshua Landis , a professor of Middle Eastern history at the University of Oklahoma who is now conducting research in Damascus . ''
 person of company: Joshua Landis, University of Oklahoma
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Joshua Landis, University of Oklahoma 
Answer:
 person of company: Joshua Landis, University of Oklahoma