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.

Sentence: 'Communities bt meds possible problem heart arrhythmia after pare hydrocodone m hydrocodone how long lastng oral morphine methadone potentiation xanax buy online .', Argument/Subject 1: 'xanax', Argument/Subject 2: 'online'
buy

Sentence: 'Paper presented at the annual meeting of the American Psychological Association , 1988 .', Argument/Subject 1: 'paper', Argument/Subject 2: 'american psychological association'
present at

Sentence: 'The Board advises Council on matters pertaining to accessibility issues , including the special needs transit system , etc . Meetings are held every second month .', Argument/Subject 1: 'council', Argument/Subject 2: 'board'
advise