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.

Input: Consider 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 .'

Output: professor


Input: Consider Input: Given Relationship: 'be city in', Sentence: 'Magnolia is a city in Columbia County , which has a population of 17,155 as of the year 2000 .'

Output: city


Input: Consider Input: Given Relationship: 'be city in', Sentence: 'The small cities of Freeport and Lucaya , on the southwest portion of Grand Bahama Island , can be seen in this southwest-looking view .'


Output: cities