957
It was in 1975 that he founded  El Sistema  formally known as the Foundation for the  National Network of Youth  and Children Orchestras of Venezuela .
 alternate names: El Sistema, National Network of Youth
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:
 alternate names: El Sistema, National Network of Youth