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: '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: 'Tenant shall pay to Landlord on demand , as additional rent any costs incurred by Landlord to review a proposed assignment or subletting including reasonable attorneys ' fees incurred by Landlord , and in addition , shall pay to Landlord with each request for its consent , a processing fee of $ 1,000 .', Argument/Subject 1: 'tenant', Argument/Subject 2: 'landlord'
Example Output: pay

Example Input: Sentence: 'Microsoft Excel ? is a trademark of Microsoft Corporation .', Argument/Subject 1: 'microsoft', Argument/Subject 2: 'microsoft corporation'
Example Output:
be trademark of