1535
Russia  's largest privately owned oil company  Lukoil  said Wednesday that net profit in the first quarter dropped 71 percent compared to a year earlier dragged down by low oil prices .
 country of headquarters: Russia, Lukoil
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Russia, Lukoil 
Answer:
 country of headquarters: Russia, Lukoil