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.

Ex Input:
Given Relationship: 'work on', Sentence: 'Jesus had the right to work on the Sabbath , just like God works on the Sabbath because the Sabbath was made for man and Jesus is saying I 'm not man , I am equal to God .'

Ex Output:
work


Ex Input:
Given Relationship: 'be professor of', Sentence: 'Your nerves learn to communicate more effectively with your muscle cells , allowing the muscle to recruit more cells during each contraction , says Mark A. W. Andrews , PhD , associate professor of physiology at Lake Erie College of Osteopathic Medicine in Erie , Pa .'

Ex Output:
professor


Ex Input:
Given Relationship: 'be chief of', Sentence: 'We work for the Chief Executive Officer also known as The President of the United States .'

Ex Output:

Chief