7648
In 1978 Ted Turner then operator of WTCG in  Atlanta Georgia  wanted to use the call letters WTBS ( for  Turner Broadcasting System  ) .
 city of headquarters: Atlanta Georgia, Turner Broadcasting System
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:
 city of headquarters: Atlanta Georgia, Turner Broadcasting System