Instructions: 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.
Input: Sentence: 'NATO members , including the United States , certainly have not expressed a willingness to take on this role generally : they did not act in Rwanda and resisted action in Bosnia .', Argument/Subject 1: 'unite state', Argument/Subject 2: 'nato'
Output:
be member of