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.

Example 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'
Example Output: be elect

Example Input: Sentence: 'The Chairman of the US Federal Reserve Bank , Ben Bernanke , rings the forex market bell at a speech he made yesterday at an economic conference in Barcelona Spain .', Argument/Subject 1: 'bernanke', Argument/Subject 2: 'federal reserve'
Example Output: be chairman of

Example Input: Sentence: 'Yin and yang are always opposite , with yin being sweet , cold , and passive and with yang being salty , hot , and aggressive .', Argument/Subject 1: 'yang', Argument/Subject 2: 'yin'
Example Output:
be opposite of