Given the task definition, example input & output, solve the new input case.
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.
Example: Sentence: 'Harry glanced again at the raw looking thing that trembled and choked in the shadow beneath the distant chair.', Argument/Subject 1: 'Harry', Argument/Subject 2: 'raw looking thing'
Output: glance
The sentence contains the generated relationship - glance, mentioned between two subjects - Harry and raw looking thing

New input case for you: Sentence: 'Washington , D.C. , January 27 , 2009 The Inter-American Commission on Human Rights expresses its deep satisfaction over the decision by the President of the United States , Barack Obama , to close the detention center at the Guantamo Bay Naval Base within a period of no later than one year and to prohibit cruel , inhuman , or degrading treatment in interrogations of detained individuals .', Argument/Subject 1: 'barack obama', Argument/Subject 2: 'unite state'
Output:
be president of