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Windows is now so big and onerous because of the size of its code base , the size of its ecosystem and its insistence on compatibility with the legacy hardware and software , that it just slows everything down , '' observed David B. Yoffie , a professor at the Harvard Business School . ''
 person of company: David B. Yoffie, Harvard Business School
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:  David B. Yoffie, Harvard Business School 
Answer:
 person of company: David B. Yoffie, Harvard Business School