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: 'William Jefferson Clinton was the 42nd president of the United States .', Argument/Subject 1: 'william jefferson clinton', Argument/Subject 2: 'unite state'
Example Output: be president of

Example Input: Sentence: 'Windows Vista has been tested and found to run fastest in Boot Camp on a Mac .', Argument/Subject 1: 'mac', Argument/Subject 2: 'vista'
Example Output: run

Example Input: Sentence: 'Melbourne is a critical hub connecting Australia to Asia Pacific and beyond .', Argument/Subject 1: 'melbourne', Argument/Subject 2: 'australium'
Example Output:
be hub of