9109
 What 's more , the United States already imports 15 percent of its oil from Africa , mostly from Angola and Nigeria ; that figure is bound to rise and could even double , eventually making Africa as large a supplier of oil as the Middle East now is . 
 location contains: Africa, Nigeria
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: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
Answer:
 location contains: Africa, Nigeria