Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.
Q: Sentence: 'Appointed as Chairman of the Board of Governors of the Federal Reserve System by President Jimmy Carter in 1979 , he was re-appointed by President Ronald Reagan in 1983 .', Argument/Subject 1: 'president', Argument/Subject 2: 'board'
A:
be chairman of