21585
 Edward S. Walker Jr. , a former ambassador to Israel and Egypt and now the president of the Middle East Institute , a research institution in Washington , said Mr. Matthews had worked directly for two years with Ambassador Alfred L. Atherton Jr. , the Carter administration 's Middle East envoy , on the details that preceded the formal talks , including talking to Egyptian and Israeli officials and preparing position papers . 
 location contains: Middle East, Israel
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: Middle East, Israel