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.

Ex Input:
Sentence: 'If Americans make the mistake of electing Barack Obama as President of the United States , as he loves to say , a change is definitely going to come .', Argument/Subject 1: 'barack obama', Argument/Subject 2: 'president'

Ex Output:
be elect

Ex Input:
Sentence: 'Eglin Air Force Base and Patrick Air Force Base held Memorial Services on the 23rd and The White House Commission on Remembrance held a Memorial Service at Arlington National Cemetery on the 25th for the families .', Argument/Subject 1: 'service', Argument/Subject 2: 'arlington national cemetery'

Ex Output:
be hold at

Ex Input:
Sentence: 'Earlier in August Tehran said it sought to forge strong ties with Iraq which waged an imposed war against Iran between 1980 and 1988 under the former president Saddam Hussein .', Argument/Subject 1: 'saddam', Argument/Subject 2: 'iraq'

Ex Output:
be president of