457
Predecessor air carriers that form the present United Airlines include : Many of these acquisitions and mergers were completed by  Continental Airlines  when this carrier was under the ownership and control of  Texas  Air Corporation from 1982 to 1987 .
 subsidiaries: Continental Airlines, Texas
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:
 subsidiaries: Continental Airlines, Texas