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: 'I bet Obama wishes he picked Hillary Clinton !', Argument/Subject 1: 'obama', Argument/Subject 2: 'hillary'
pick

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'
run on

Sentence: 'The Pope said this Thursday in an audience with participants at the 57th General Assembly of the Italian bishops ' conference , who are holding a meeting in the Vatican on " Jesus Christ , the only Savior of the world : the Church in mission 'ad gentes ' and among us . "', Argument/Subject 1: 'jesus christ', Argument/Subject 2: 'world'
be savior of