1764
Even after Barrientos ' death Guevara Arze continued as  Bolivia  's ambassador to the United Nations under Presidents  Luis Adolfo Siles Salinas  and Alfredo Ovando until 1970 .
 Bolivia, Luis Adolfo Siles Salinas
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 Bolivia, Luis Adolfo Siles Salinas