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: 'Having seen early reports of Firefox not working in Vista , I was anxious to confirm this .', Argument/Subject 1: 'firefox', Argument/Subject 2: 'vista'
Example Output: work on

Example Input: Sentence: 'The Chinese language - China wawa , chinaman wawa , china lalang , chinaman lalang - more particularly Cantonese .', Argument/Subject 1: 'chinese', Argument/Subject 2: 'china'
Example Output: be language in

Example Input: Sentence: 'The Euro , the currency of the European Union , is the official currency of Guadeloupe .', Argument/Subject 1: 'euro', Argument/Subject 2: 'european union'
Example Output:
be currency of