921
These letters deal primarily with Thompson and his editor at Random House Jim Silberman his correspondence with Oscar Zeta Acosta and his perpetually fluctuating relationship with  Jann Wenner  the founder of  Rolling Stone  .
 founded by: Jann Wenner, Rolling Stone
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: Jann Wenner, Rolling Stone