Detailed 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.
Q: Sentence: 'The Hillary Clinton campaign has written a letter to Barack Obama , asking the Illinois senator to stop running what they call a false ad in New Hampshire that claims his health care plan would cover everyone .', Argument/Subject 1: 'hillary', Argument/Subject 2: 'obama'
A:
campaign for