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SpaceX  was founded in June 2002 by PayPal and Tesla Motors co-founder  Elon Musk  who had invested US$ 100 million of his own money by March 2006 .
 SpaceX, Elon Musk
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 SpaceX, Elon Musk