7014
With sanctions preventing American oil companies from investing in Sudan , China has emerged as a key investor in the country , Africa 's third-largest oil producer after Nigeria , a longtime OPEC member , and Angola .
 location contains: Africa, Sudan; location contains: Africa, Nigeria; location contains: Africa, Angola
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: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 location contains: Africa, Sudan; location contains: Africa, Nigeria; location contains: Africa, Angola