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: 'Shimla originally called Simla , is the capital city of Himachal Pradesh .', Argument/Subject 1: 'shimlum', Argument/Subject 2: 'himachal pradesh'

A: be capital city of
****
Q: Sentence: 'McCullough focusses on Mary , the plain and pontificating middle sister .', Argument/Subject 1: 'mccullough', Argument/Subject 2: 'mary'

A: focus on
****
Q: Sentence: 'We are thrilled to be able to present this offer , commemorating this historic time as Barack Obama takes his office as the 44th President of the United States of America .', Argument/Subject 1: 'barack obama', Argument/Subject 2: 'unite state'

A:
be president of
****