Detailed Instructions: 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.
Q: Sentence: 'Reagan becomes the first U.S. President to address the combined Houses of Parliament , taking Britain 's side in the Falkland Islands conflict with Argentina .', Argument/Subject 1: 'reagan', Argument/Subject 2: 'president'
A:
become