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: 'President elect Barack Obama has promised to create a new American Opportunity Tax Credit worth $ 4,000 in exchange for 100 hours of community service , according to the Obama-Biden Web site .', Argument/Subject 1: 'president', Argument/Subject 2: 'obama'

A: elect
****
Q: Sentence: 'Obama apparently refers to Clintons comment that it was a fairy tale that Obama has consistently opposed to the Iraq war from the start , and that Nevada union officials backing Obama were strong-arming members into caucusing for Obama .', Argument/Subject 1: 'obama', Argument/Subject 2: 'iraq'

A: oppose war in
****
Q: Sentence: 'Library of Congress The Library of Congress , the national library of the United States and the research arm of the U.S. Congress , is the largest library in the world .', Argument/Subject 1: 'library of congress', Argument/Subject 2: 'unite state'

A:
be library of
****