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: 'Diego Garcia , a low-lying island in the Chagos Group Archipelago located in the Indian Ocean , is a critical strategic location for the United States Military ship and aircraft ...', Argument/Subject 1: 'diego garcium', Argument/Subject 2: 'indian ocean'
[A]: be island in

[Q]: Sentence: 'The Web Pen Blog is proudly powered by WordPress .', Argument/Subject 1: 'blog', Argument/Subject 2: 'wordpress'
[A]: be power by

[Q]: Sentence: 'And it was at this point that Paulson , prodded by Federal Reserve chairman Ben Bernanke , addressed that policy contradiction mentioned earlier , even if they did so in a way that would ultimately lead to the next stage of the crisis .', Argument/Subject 1: 'bernanke', Argument/Subject 2: 'federal reserve'
[A]:
be chairman of