570
Think of President Richard M. Nixon 's trip to China , the trip by President Anwar el-Sadat of Egypt to Jerusalem , and Nelson Mandela 's negotiations with President F.W. de Klerk of South Africa .
 nationality: Nelson Mandela, South Africa
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: 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:
 nationality: Nelson Mandela, South Africa