6812
 At the heart of the remaining investigation into Mr. Rove are the circumstances surrounding a July 11 , 2003 , telephone conversation between Mr. Rove and Mr. Cooper , who turned the interview to questions about a 2002 trip to Africa by Joseph C. Wilson IV , a former ambassador , who was sent by the C.I.A. to investigate claims that Iraq had sought to be buy uranium ore from Niger . 
 location contains: Africa, Niger
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, Niger