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.

[Q]: 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 .'
[A]: professor


[Q]: Given Relationship: 'be president of', Sentence: 'Having Obama elected as the United States ' next president comes as more of a shock than anything I 'd expected out of this election .'
[A]: president


[Q]: Given Relationship: 'be government of', Sentence: 'Barnett Rubin weighs in on reports of the Afghanistan government negotiating with the Taliban .'
[A]:
government