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.

Example 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 .'
Example Output: son

Example Input: Given Relationship: 'be president of', Sentence: 'At noon EST , Barack H. Obama became the 44th president of the United States of America .'
Example Output: president

Example Input: Given Relationship: 'become', Sentence: 'Winston Churchill becomes British Prime Minister .'
Example Output:
becomes