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 capital of', Sentence: 'Rome is the capital of Italy and the ruling seat of the Roman Empire and Catholicism .'
capital

Given Relationship: 'be chairman of', Sentence: 'Alan Greenspan , the Chairman of the U.S. Federal Reserve , the current U.S. administration , and U.S. politicians of all stripes could teach a few lessons to those who dictated the level of inflation ahead of them .'
Chairman

Given Relationship: 'be threat to', Sentence: 'Iran is telling Hamas to antagonize Israel to redirect Israel 's attention from Iran 's serious threat to "blow Israel off the face of the Earth " with their increasing nuclear technology .'

threat