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: 'present to', Sentence: 'Paper presented at the CHI'2001 Conference on Human Factors in Computing Systems , Seattle , WA , April , 2001 .'

Ex Output:
presented


Ex Input:
Given Relationship: 'be elect by', Sentence: 'On November 4 , 2008 America spoke loud and clear when electing Barack Obama President of the United States .'

Ex Output:

electing