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 Q]: Given Relationship: 'be mayor of', Sentence: 'Former New York City mayor Rudy Giuliani joined in the mockery .'
[EX A]: mayor

[EX Q]: 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 A]: unto

[EX Q]: Given Relationship: 'be use of', Sentence: 'UDP - User Datagram Protocol may be much less commonly used than TCP , but some applications can benefit greatly from UDP.'
[EX A]:
used