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 chairman of', Sentence: 'Alan Greenspan , Chairman of the Board of Governors of the Federal Reserve System , gave the conference keynote address .'

A: Chairman
****
Q: Given Relationship: 'be president of', Sentence: 'Join us in supporting Hillary Clinton for President of the United States to bring back our democracy !'

A: President
****
Q: Given Relationship: 'be moon of', Sentence: 'The lander for the Saturn moon Titan that is part of the Cassini probe was named after Huygens .'

A:
moon
****