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: 'Arabic is the official or co-official language of Algeria , Bahrain , Chad , Djibouti , Egypt , Iraq , Jordan , Kuwait , Lebanon , Libya , Morocco , Oman , Palestinian West Bank and Gaza , Qatar , Somalia , Sudan , Syria , Tunisia , Mauritania , United Arab Emirates , and Yemen .', Argument/Subject 1: 'arabic', Argument/Subject 2: 'unite arab emirate'
[EX A]: be language of

[EX Q]: Sentence: 'Paper presented at the 55th Annual Conference of the International Communication Association , New York , NY , USA .', Argument/Subject 1: 'paper', Argument/Subject 2: 'international communication association'
[EX A]: present at

[EX Q]: Sentence: 'Thomas Jefferson , third president of The United States , was also an agriculturalist , horticulturist , architect , etymologist , archaeologist , mathematician , cryptographer , surveyor , paleontologist , author , lawyer , inventor , violinist , and the founder of the University of Virginia .', Argument/Subject 1: 'thoma jefferson', Argument/Subject 2: 'unite state'
[EX A]:
be president of