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: 'The largest member of OPEC , Saudi Arabia , controls one-fifth of the world 's crude reserves and constitutes more than 10 percent of world daily production of crude oil , making it one of the most critical suppliers influencing this market .', Argument/Subject 1: 'saudus arabium', Argument/Subject 2: 'opec'

Output: be member of

Input: Consider Input: Sentence: 'The current President , Dr. Peter Fong , is the Head of the Centre for Executive Development of HKU SPACE and former Executive Vice President and Professor of Asia International Open University .', Argument/Subject 1: 'president', Argument/Subject 2: 'executive'

Output: be head of

Input: Consider Input: Sentence: 'Lucy Firlie has held principal viola positions with the Ohio Chamber Orchestra in Cleveland , the Oklahoma Symphony in Oklahoma City , and the Orchestra de Mineria in Mexico City .', Argument/Subject 1: 'cleveland', Argument/Subject 2: 'ohio'
Output: be city in