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 son of', Sentence: 'She married Major Arthur William Fitz Roy Somerset , son of Field Marshal FitzRoy James Henry Somerset , 1st Baron Raglan , on 8 July 1845 .'

Ex Output:
son


Ex Input:
Given Relationship: 'be president of', Sentence: 'Barack Obama today becomes the first black president of the United States of America .'

Ex Output:
president


Ex Input:
Given Relationship: 'lead', Sentence: 'A CNN/Time poll conducted in late September showed McCain with a slight 50-46 lead over Obama , and an ARG poll released this week suggested Obama had rocketed to an eight-point over his Republican rival .'

Ex Output:

lead