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Cielos del Sur S.A. operating as  Austral  more commonly known by its shortened name Austral is a domestic airline of Argentina the sister company of  Argentinas  .
 subsidiaries: Austral, Argentinas
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Austral, Argentinas 
Answer:
 subsidiaries: Austral, Argentinas