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 president of', Sentence: 'Remember just a few short years ago ? Bill Clinton was President of the United States , Tony Blair was a popular figure , the Patriots still sucked , and virtually every male you knew would watch professional wrestling on a Monday Night .'

A: President
****
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 suburb of', Sentence: 'Originally from the Maryland suburbs of Washington DC and the daughter of a US Navy Captain , Katrina has lived abroad but moved with her husband nine years ago upon his transfer to the Naval Air Station Key West .'

A:
suburbs
****