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: 'be president of', Sentence: 'Afghanistan president Hamid Karzai met Prime Minister Manmohan Singh at the Hyderabad House in New Delhi on Monday .'

Ex Output:
president


Ex Input:
Given Relationship: 'be chairman of', Sentence: 'President Bush named his top economic advisor , Ben Bernanke to replace economic legend Alan Greenspan as the chairman of the Federal Reserve .'

Ex Output:
chairman


Ex Input:
Given Relationship: 'be celebrate on', Sentence: 'At the Nicaean Council in 325 AD it was decided that Easter would be celebrated on the Sunday after the first full moon on or after the day of the vernal equinox .'

Ex Output:

celebrated