11923
 The outbreak is unrelated to the one that began spreading from Nigeria in 2004 through several countries in central Africa and the Arabian peninsula , and is unusual in that it is striking mostly adults , according to the World Health Organization . 
 location contains: Africa, Nigeria
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, Nigeria