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.

[EX Q]: 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'
[EX A]: be member of

[EX Q]: Sentence: 'XHTML is a modified version of HTML that is fully XML compatible , so that it can be processed by XML parsers .', Argument/Subject 1: 'xhtml', Argument/Subject 2: 'html'
[EX A]: be version of

[EX Q]: Sentence: 'Paper presented at the 6th International Conference on Language and Social Psychology , Ottawa , Canada , 16-20 May 1997 .', Argument/Subject 1: 'paper', Argument/Subject 2: 'conference'
[EX A]:
present to