1410
On April 3  2006  Frontier created  Frontier Airlines Holdings  Inc. ( FRNT ) a holding company incorporated in Delaware to take advantage of favorable tax laws in that state .
 founded: 2006, Frontier Airlines Holdings
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: 2006, Frontier Airlines Holdings