25503
3 Africa 's Borderless Wars Foreign rebels have used the porous borders of Central African Republic , a potential bulwark against the chaos of its neighbors in Chad and the Darfur region of Sudan , as a staging ground to mount attacks over the border , spreading what the United Nations has called the world 's '' gravest humanitarian crisis . ''
 location contains: Africa, Chad; location contains: Africa, Sudan
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, Chad; location contains: Africa, Sudan