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: 'Buy V-RX Va herbal alternative to Viagra from the online sex store at SexyFun.co.uk .', Argument/Subject 1: 'viagra', Argument/Subject 2: 'online'
[A]: buy

[Q]: Sentence: 'This " How to do Swingers " video requires the latest version of Adobe Flash Player .', Argument/Subject 1: 'video', Argument/Subject 2: 'flash player'
[A]: require

[Q]: Sentence: 'Barack Obama may beat John McCain in November to be the next president of the United States .', Argument/Subject 1: 'obama', Argument/Subject 2: 'unite state'
[A]:
be president of