836
Relations between Zimbabwe and Botswana have cooled since  President   Ian Khama  the only leader in southern Africa openly critical of President Robert Mugabe came to power .
 title of person: President, Ian Khama
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: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 title of person: President, Ian Khama