21237
 Morgan Stanley Names Investment Banking Chief John J. Mack , chief executive of Morgan Stanley , named Walid Chammah to head the firm 's investment banking division . 
 company: John J. Mack, Morgan Stanley; company: Walid Chammah, 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: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  John J. Mack, Morgan Stanley; Walid Chammah, Morgan Stanley 
Answer:
 company: John J. Mack, Morgan Stanley; company: Walid Chammah, Morgan Stanley