9552
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 .
 founded by: SpaceX, Elon Musk
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: SpaceX, Elon Musk