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.

Example Input: Sentence: 'Michael Steele , chairman of the Republican National Committee , said Tuesday in a statement .', Argument/Subject 1: 'michael steele', Argument/Subject 2: 'republican national committee'
Example Output: be chairman of

Example Input: 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'
Example Output: be language of

Example Input: Sentence: 'The Associate Editor and the Book Review Editor shall be appointed by the Editor in consultation with the Executive Committee .', Argument/Subject 1: 'editor', Argument/Subject 2: 'associate editor'
Example Output:
appoint