2197
And he was the first four-star general to warn that the rise of sectarian violence in Iraq , after the mosque bombing in Samarra in February , had replaced terrorism and Sunni insurgents as the greatest security challenges there , telling Congress that Iraq risked sliding toward civil war .
 Iraq, Samarra; Iraq, Samarra
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:
 Iraq, Samarra; Iraq, Samarra