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Founders of technology companies include Ralph J. Roberts ( co-founder of Comcast )  Elon Musk  ( founder of Paypal Tesla Motors and  SpaceX  ) Leonard Bosack ( co-founder of Cisco ) David Brown ( co-founder of Silicon Graphics ) and Mark Pincus ( founder of Zynga the company behind Farmville ) .
 founded by: Elon Musk, SpaceX
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: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 founded by: Elon Musk, SpaceX