3138
Beginning in 2005  Citgo  Petroleum Company ( Citgo ) a wholly owned subsidiary of de Venezuela (  PDVSA  ) the Venezuelan state-owned oil company has been the primary donor of heating oil to Citizens Energy .
 subsidiaries: Citgo, PDVSA
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:
 subsidiaries: Citgo, PDVSA