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.

Input: Consider Input: Given Relationship: 'look at', Sentence: 'Gabrielle swivelled round to look at the grinning Xena .'

Output: look

Input: Consider Input: Given Relationship: 'be grandfather of', Sentence: 'George III was also the grandfather of Queen Victoria , who was the daughter of his fourth son , Edward Augustus , the Duke of Kent .'

Output: grandfather

Input: Consider Input: Given Relationship: 'perform duty of', Sentence: 'The Vice-President shall succeed to the presidency in case of a vacancy in that office and shall perform the duties of the President in his absence or disability .'
Output: perform