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 city in', Sentence: 'Only Auckland of New Zealand cities rated higher as it was ranked fifth in the world in 2006 and 2007 .'

A: cities
****
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 city in', Sentence: 'Cedar Rapids is the second most populous city in the state of Iowa .'

A:
city
****