You will be given a definition of a task first, then some input of the task.
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.

Sentence: 'Dave Kopel is research director of the Independence Institute .', Argument/Subject 1: 'dave kopel', Argument/Subject 2: 'independence institute'
Output:
be research director of