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.

[Q]: Given Relationship: 'be fill by', Sentence: 'A Vacancy in the office of President shall be filled by the Vice .'
[A]: filled

[Q]: Given Relationship: 'be president of', Sentence: 'At noon EST , Barack H. Obama became the 44th president of the United States of America .'
[A]: president

[Q]: Given Relationship: 'be district in', Sentence: 'The Theatre Museum in the Covent Garden district of London , England , is the United Kingdom 's National Museum of the Performing Arts .'
[A]:
district