2273
In the 1970s the Botswana Trade Union and Education Centre was created and it was replaced in  1977  by the current national trade union centre the  Botswana Federation of Trade Unions  ( BFTU ) .
 founded: 1977, Botswana Federation of Trade Unions
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  1977, Botswana Federation of Trade Unions 
Answer:
 founded: 1977, Botswana Federation of Trade Unions