Given the task definition and input, reply with output. From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

Given Relationship: 'be columnist for', Sentence: 'Joining Professor Gewirtz and Center staff in the workshop were American experts on media freedom and tort law , including celebrated New York Times columnist Anthony Lewis , YLS Professor Robert Post , Judge Robert Sweet from the University of Virginia , and Professor Michael Chesterman , Australia 's leading defamation law expert .'
columnist