13506
Descended from the  Luxembourg  Airlines Company founded in 1948  Luxair  was set up in 1961 to meet the growing demand for air links between Luxembourg and other European cities .
 founded by: Luxembourg, Luxair
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: Luxembourg, Luxair