5780
In  Australia  the weaker Australian dollar also impacted SingTel's earnings at the group level even though  Optus  delivered a 6.8 percent jump in operating revenues from a year ago .
 country of headquarters: Australia, Optus
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:
 country of headquarters: Australia, Optus