instruction:
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.
question:
Sentence: 'Italy invaded Greece in October 1940 via Albania but was forced to withdraw after a few months .', Argument/Subject 1: 'greece', Argument/Subject 2: 'italy'
answer:
be invade by


question:
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'
answer:
be president of


question:
Sentence: 'The CIA President and the CIA Immediate Past President are voting members on the AFC Board .', Argument/Subject 1: 'president', Argument/Subject 2: 'board'
answer:

be member of