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.

Ex Input:
Given Relationship: 'say unto', Sentence: 'And the LORD said unto Moses , The man shall be surely put to death : all the congregation shall stone him with stones . "'

Ex Output:
unto


Ex Input:
Given Relationship: 'be secretary-general of', Sentence: 'Secretary-General Ban Ki-moon appointed Kiyotaka Akasaka of Japan as United Nations Under-Secretary-General for Communications and Public Information on April 1 2007 .'

Ex Output:
Secretary-General


Ex Input:
Given Relationship: 'be city in', Sentence: 'Boston is one of the important cities in United States of America which is known for a large number of advertising agencies .'

Ex Output:

cities