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.

Sentence: 'The President shall formulate a proposed solution and poll each Board member by telephone or mail , or conduct the necessary interim business of the District which the President feels does not require action of the entire Board .', Argument/Subject 1: 'president', Argument/Subject 2: 'board'
be member of