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John J. Mack , taking further steps to solidify his management team at Morgan Stanley , named Walid Chammah yesterday to head the firm 's all-important investment banking division .
 person of company: John J. Mack, Morgan Stanley; person of company: Walid Chammah, Morgan Stanley
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 person of company: John J. Mack, Morgan Stanley; person of company: Walid Chammah, Morgan Stanley