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.
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Question: Sentence: 'Each time the computer boots up you can choose whether to run Mac OS X or the installed version of Windows .', Argument/Subject 1: 'window', Argument/Subject 2: 'mac'

Answer: run on


Question: Sentence: 'I was editor of Surfer magazine , and Richard Nixon was president of the United States .', Argument/Subject 1: 'nixon', Argument/Subject 2: 'unite state'

Answer: be president of


Question: Sentence: 'Paper presented at the Eleventh International Conference on Gambling and Risk Taking , Las Vegas , NV.', Argument/Subject 1: 'paper', Argument/Subject 2: 'international'

Answer:
present at