TASK DEFINITION: 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.
PROBLEM: Sentence: 'The election of Illinois Senator Barack Obama as America 's 44th president is astounding , historical , implausible , improbable and completely without precedent in the history of the United States .', Argument/Subject 1: 'obama', Argument/Subject 2: 'america'

SOLUTION: be president of

PROBLEM: Sentence: 'Engineers continued to review photographs of the affected area to determine whether it could pose a problem when Atlantis returns to Earth .', Argument/Subject 1: 'atlanti', Argument/Subject 2: 'earth'

SOLUTION: return to

PROBLEM: Sentence: 'The only two Democrats to win the White House since 1964 spoke openly of Christian faith .', Argument/Subject 1: 'democrat', Argument/Subject 2: 'house'

SOLUTION:
win