3878
Later moving back to private practice in San Diego he made a name for himself by proving that  Pacific Southwest Airlines  (  PSA  ) was liable for a mid-air plane crash over San Diego in 1978 then the worst aviation disaster in U.S. history .
 alternate names: Pacific Southwest Airlines, PSA
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:
 alternate names: Pacific Southwest Airlines, PSA