2672
A 2002 reform modified the system to an 10 digits system starting with the leading national access code 0 ( which is dropped when calling from outside  Romania  and replaced with +40 ) : Most VoIP providers ( SmartCall TelefonIP ) offer numbers bought from the wholesale service of  Romtelecom  .
 country of headquarters: Romania, Romtelecom
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: Romania, Romtelecom