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: 'be service of', Sentence: 'See a list of publications by Mayo Clinic authors on mitral valve disease on PubMed , a service of the National Library of Medicine .'
service

Given Relationship: 'be president of', Sentence: 'Tomorrow Barack Obama will become president of the United States .'
president

Given Relationship: 'be director of', Sentence: 'An Act of Censorship : American Library Association Becomes Another Israeli Occupied Territory By Jeffrey Blankfort NEW ORLEANShe embattled Anti-Defamation League 's National Director , Abraham Foxman , is "going to war and he 's going to enlist American Jews as his foot soldiers , " wrote the No. California Jewish Bulletin 's Garth Wolkoff this past May , and he was n't joking .'

Director