10729
My view is that stocks really ca n't deliver the same returns in the future as in the past , unless we have a major decline in stock prices , '' said John Y. Campbell , a professor of economics at Harvard University and an adviser to the Social Security trustees on the issue in 2001 . ''
 person of company: John Y. Campbell, Harvard University
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 Y. Campbell, Harvard University