8735
Under the agreement CNPC will take a 49 percent stake in  Nippon Oil  's refinery in Osaka western Japan while the Japanese  refiner  will keep 51 percent a Nippon Oil spokesman said .
 alternate names: Nippon Oil, refiner
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:  Nippon Oil, refiner 
Answer:
 alternate names: Nippon Oil, refiner