8716
In 1940  Oslo Sporveier  set up the  Oslo trolleybus  network a network of four trolleybus routes but is was abandoned in 1967 .
 founded by: Oslo Sporveier, Oslo trolleybus
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: Oslo Sporveier, Oslo trolleybus