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 Web Pen Blog is proudly powered by WordPress .', Argument/Subject 1: 'blog', Argument/Subject 2: 'wordpress'

Output: be power by

Input: Consider Input: Sentence: 'The Board in its discretion may appoint such other officers and agents , including Vice Presidents , Assistant Secretaries and Assistant Treasurers , as it shall deem necessary , who shall hold their offices for such terms and shall exercise such powers and perform such duties as shall be determined by the Board .', Argument/Subject 1: 'board', Argument/Subject 2: 'president'

Output: appoint

Input: Consider Input: Sentence: 'Moscow is also threatening to leave the Intermediate Range Nuclear Forces treaty amid tensions linked to a planned US missile-defence shield in NATO members Poland and the Czech Republic .', Argument/Subject 1: 'poland', Argument/Subject 2: 'nato'
Output: be member of