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.

Input: Consider Input: Sentence: 'I was editor of Surfer magazine , and Richard Nixon was president of the United States .', Argument/Subject 1: 'nixon', Argument/Subject 2: 'unite state'

Output: be president of

Input: Consider Input: Sentence: 'McCullough focusses on Mary , the plain and pontificating middle sister .', Argument/Subject 1: 'mccullough', Argument/Subject 2: 'mary'

Output: focus on

Input: Consider Input: Sentence: 'The National Management Board is responsible to elect the Chairman and the President of the Association .', Argument/Subject 1: 'board', Argument/Subject 2: 'president'
Output: elect