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The deal , which could be completed this week , would be a coup for Merrill Lynch and a disappointment for John J. Mack , the chief executive of Morgan Stanley , who just weeks ago had pursued a similar agreement with BlackRock and its chief executive , Laurence D. Fink .
 John J. Mack, Morgan Stanley; Laurence D. Fink, BlackRock
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:
 John J. Mack, Morgan Stanley; Laurence D. Fink, BlackRock