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While Microsoft 's co-founder and chairman , Bill Gates , was able to turn his company abruptly in the mid-1990 's to respond to the challenge posed by Netscape , Microsoft has proved less effective in blunting a similar challenge to its dominance from Google .
 person of company: Bill Gates, Microsoft; company founders: Microsoft, Bill Gates; person of company: Bill Gates, Microsoft; company founders: Microsoft, Bill Gates
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:  Bill Gates, Microsoft; Microsoft, Bill Gates; Bill Gates, Microsoft; Microsoft, Bill Gates 
Answer:
 person of company: Bill Gates, Microsoft; company founders: Microsoft, Bill Gates; person of company: Bill Gates, Microsoft; company founders: Microsoft, Bill Gates