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Ecton was the last Republican U.S. senator from  Montana  until the election in 1988 of  Conrad Burns  who served from 1989 to 2007 .
 state or provinces of residence: Montana, Conrad Burns
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:  Montana, Conrad Burns 
Answer:
 state or provinces of residence: Montana, Conrad Burns