6817
 Her father , William O. Ludwig of Aurora , Colo. , retired as the chief financial officer of the Holly Sugar Company in Colorado Springs and served in the Peace Corps from 1995 to 1997 in Sofia , Bulgaria , as a small-business consultant . 
 administrative division of country: Sofia, Bulgaria; country of administrative divisions: Bulgaria, Sofia
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  Sofia, Bulgaria; Bulgaria, Sofia 
Answer:
 administrative division of country: Sofia, Bulgaria; country of administrative divisions: Bulgaria, Sofia