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The attachment to the  9th Bomb Group  became a formal assignment on  25 February 1942  and by mid-February following an accident to one of its B-18's and severe maintenance problems with the other aircraft ( one other B-18 and two B-18A's ) the Squadron could count only one B-18A as airworthy and ready for action .
 founded: 9th Bomb Group, 25 February 1942
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: 9th Bomb Group, 25 February 1942