Definition: 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.
Input: Sentence: 'When Clinton and European Commission President Romano Prodi met in Washington in December 1999 , the two leaders pledged to continue to work together in the Balkans .', Argument/Subject 1: 'commission', Argument/Subject 2: 'washington'
Output:
meet in