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: 'surrender at', Sentence: 'When Cornwallis surrendered at Yorktown it is said while the British played The World Turned Upside Down , the Americans played Yankee Doodle .'

Ex Output:
surrendered


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: 'be language of', Sentence: 'Portuguese is the official language of Brazil , and it is found in every school , newspaper , television broadcast and business transaction .'

Ex Output:

language