3547
The  Rompetrol  Group N.V. is the owner of the Petromidia Refinery in N?vodari  ; Romani  a renamed Rompetrol Rafinare S.A. which was built between 1975 and 1977 and modernized in the early 1990s currently it has a capacity to process tons of crude oil per day .
 country of headquarters: Rompetrol, ; Romani
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: Rompetrol, ; Romani