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 headquarters of the United States Military Cancer Institute is located at the Walter Reed Army Medical Center in Washington , D.C.', Argument/Subject 1: 'center', Argument/Subject 2: 'unite state'
be locate in

Sentence: 'Paper presented at the Association for the Advancement of Applied Sport Psychology Conference .', Argument/Subject 1: 'paper', Argument/Subject 2: 'conference'
present at

Sentence: 'Abu Dhabi is the capital of the United Arab Emirates and is also known as the ' Garden City of the Gulf ' .', Argument/Subject 1: 'abu dhabus', Argument/Subject 2: 'unite arab emirate'

be capital of