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John J. Mack of Morgan Stanley helped engineer a merger of the firm with Dean Witter in 1997 , but was ousted in 2001 by his merger partner , Philip J. Purcell .
 person of company: John J. Mack, Morgan Stanley
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:  John J. Mack, Morgan Stanley 
Answer:
 person of company: John J. Mack, Morgan Stanley