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.

Given Relationship: 'arrange for', Sentence: 'Loki arranged for Hoder , the blind God of Darkness , to shoot Balder the beautiful , the God of Joy and Gladness , with a mistletoe-tipped arrow .'
arranged

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 .'
professor

Given Relationship: 'visit', Sentence: 'Pope John Paul II is visiting the Communist-ruled Caribbean island of Cuba .'

visiting