48718
In what would prove a prescient warning , the State Department intelligence analysts said in a top-secret assessment on Mr. bin Laden that summer that '' his prolonged stay in Afghanistan -- where hundreds of ` Arab mujahedeen ' receive terrorist training and key extremist leaders often congregate -- could prove more dangerous to U.S. interests in the long run than his three-year liaison with Khartoum , '' in Sudan .
 Sudan, Khartoum; Sudan, Khartoum
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 Sudan, Khartoum; Sudan, Khartoum