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: 'The VIAGRA is still tremendous , but VIAGRA is exchanger silly buggers with VIAGRA certain side effects Buy Viagra Online .', Argument/Subject 1: 'viagra', Argument/Subject 2: 'online'
buy

Sentence: 'William McKinley of Stark County , Ohio is elected the 26th President of the United States .', Argument/Subject 1: 'william mckinley', Argument/Subject 2: 'unite state'
be elect president of

Sentence: 'The initials RSS can stand for different things , including Rich Site Summary or Really Simple Syndication .', Argument/Subject 1: 'rss', Argument/Subject 2: 'rich site summary'
stand for