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 language of', Sentence: 'Do you want to teach English as a Foreign Language inside Canada or another English-speaking country ?'

A: Language
****
Q: Given Relationship: 'executive', Sentence: 'The aim is to put a populist face on the need for the American auto industry 's survival and to build grassroots support for federal aid , in the wake of criticism that the Detroit Three chief executive officers and UAW President Ron Gettelfinger did not make a convincing case during two days of congressional hearings last week .'

A:
executive
****